CARFOCALvehicle research
Research CarsCompareRankingsArticles
  1. Home›
  2. Manufacturers›
  3. Chevrolet›
  4. Trailblazer›
  5. 2021›
  6. Complaints

2021 Chevrolet Trailblazer Owner Complaints

Updated May 30, 20261 Critical Recalls
Daniel Wilson
2021 Chevrolet Trailblazer Owner Complaints

Complaint Summary

The 2021 Chevrolet Trailblazer has 223 reported complaints.

  • Top issues involve unknown or other and power train.

Reliability Score

Reliability Score

6.5/ 10

Based on 223 complaints

Most Frequent Issues

UNKNOWN OR OTHER

36 16.1%

POWER TRAIN

32 14.3%

ELECTRICAL SYSTEM

30 13.5%

SERVICE BRAKES

26 11.7%

ENGINE

25 11.2%

Quick Insights

  • The top category is UNKNOWN OR OTHER, accounting for 16.1% of all complaints.

  • Owners have reported issues across 32 distinct vehicle systems.

  • Note: Complaint data reflects owner reports and may not always indicate a verified defect. Compare with Recalls and TSBs for a complete picture.

Subscribe to Recall Alerts

Get notified when a new recall or important ownership update lands for the 2021 Chevrolet Trailblazer.

Free alerts based on U.S. recall data. Unsubscribe anytime.

Complaint Summary

What owners keep reporting on the 2021 Chevrolet Trailblazer

The 2021 Chevrolet Trailblazer has 223 owner complaints in this dataset. UNKNOWN OR OTHER is the most common complaint category, representing about 16% of the reports shown here.

Most common complaint categories

The top complaint groups for the 2021 Chevrolet Trailblazer are UNKNOWN OR OTHER (36), POWER TRAIN (32), ELECTRICAL SYSTEM (30).

Are these complaints a serious red flag?

Potentially. 111 complaint reports involve higher-attention systems like brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection.

What should buyers inspect on a used 2021 Chevrolet Trailblazer?

Start with the top complaint systems, compare them against the recall report, then inspect service records for evidence that those same areas were already repaired or monitored.

Read the full buyer guideRecall report and remedy notesMaintenance costs and intervals2022 Trailblazer complaints2023 Trailblazer complaints2024 Trailblazer complaints

Detailed Complaint Log

Showing 32 of 32 systems

UNKNOWN OR OTHER

36 Reports16% of total

Previewing the first 2 complaint summaries.

THEIRS A DELAY ON BACKUP CAMERA.ALSO ON ANDROID PLAY IT SHUTS OF AND ON ON THE SCREEN.

12/18/2020

TWO TIMES I HAVE HEARD A LOUD POP NOISE COMING THROUGH MY STEREO SPEAKERS. I NOTICED IT WHEN APPLYING THE BRAKES. I WENT ON A TRAILBLAZER FORUM AND A FEW OTHERS HAD REPORTED THE SAME THING. I HEARD THE POP TODAY WHEN I WAS PULLING INTO A PARKING SPOT AND APPLYING THE BRAKES.

3/17/2021

34 more complaints are available in this category.

POWER TRAIN

32 Reports14% of total

Previewing the first 2 complaint summaries.

The vehicle began to give the error Shift to Park when the vehicle was in park and after the power was shut off. Because of this I cannot safely turn off the vehicle because it cannot recognize it's in park and will run the battery down whenever I use the vehicle. This problem has been previously presented in other models manufactured by GM. I am taking the vehicle in for inspection at a local Chevrolet dealership on 9/24/22 at 8 am. This issue first started around the second week of September this year with one or two errors here and there. Now, it happens every time I drive the vehicle.

9/23/2022

When I shift the gear from PARK to DRIVE & step on the GAS, the vehicle hesitates to DRIVE. I have to turn off my vehicle, play with the gear shift, then shift again to get it to move. The other day I put my vehicle in DRIVE and it rolled back and REVERSED. Nobody can figure out what’s wrong with my vehicle. The check engine light comes on then goes off. Nobody can get the problem to duplicate. A ticket to GMC was submitted and from them, my vehicle seems fine on paper. This is a safety hazard. I’ve taken my vehicle to a Chevy dealer and also to a GMC dealer multiple times.

3/21/2023

30 more complaints are available in this category.

ELECTRICAL SYSTEM

30 Reports13% of total

Previewing the first 2 complaint summaries.

Within 3 months of owning the vehicle I started to hear a crackling sound coming from the passenger speaker in the door. At first it was loud and I thought someone hit me. It did it several times and then stopped. It has happened about a dozen times since I have owned the vehicle. When I took it in for my oil change I told them and they could not replicate it so they didn't know what it was and didn't see anything. It actually just happened again yesterday so when I take it in again I will tell them about this. We thought maybe it was only when it rained but that is not the case, it just happens and I can't think of anything that is consistent when it does. It comes out loud and scares me every time. I just want this fixed, I have only owned my car for 1 year now and like everything but this.

7/27/2021

Was in the middle of a 3 car collision. After about 5 min engine started smoking and a fire started. Fire slowly escalated and fully engulfed the entire car.

9/6/2021

28 more complaints are available in this category.

SERVICE BRAKES

26 Reports12% of total

Previewing the first 2 complaint summaries.

BRAKES REQUIRED EXTREME PRESSURE TO STOP THE VEHICLE. ACCIDENT BARELY AVOIDED DURING RUSH HOUR TRAFFIC ON BUSY SURFACE ROAD.

9/28/2020

WHEN PARKING OR ABOUT TO MOVE AND YOU PUT FOOT ON BRAKE AND GET INTO A GEAR A LOUD AUDIBLE POPPING NOISE COMES THROUGH THE STEREO SYSTEM. IT IS VERY LOUD AND NOT BASED ON HOW LOW OR HIGH THE VOLUME OF THE STEREO IS SET. THERE IS A THREAD ON TRAILBLAZERTALK.COM ABOUT IT NOW. HTTPS://WWW.TRAILBLAZERTALK.COM/THREADS/POPPING-NOISE-IN-RADIO-WHEN-BRAKES-APPLIED.244/#POST-1557

11/13/2020

24 more complaints are available in this category.

ENGINE

25 Reports11% of total

Previewing the first 2 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving at an undisclosed speed, the AUTO-STOP was not functioning properly. Additionally, the doors would not unlock on two separate occasions. Additionally, the keyless ignition button would not turn off the vehicle until the contact applied pressure while pressing on the button. The contact also stated that the tire pressure sensor was faulty. The check engine warning light and reduced power message was displayed on the instrument panel. The vehicle was taken to the dealer on two separate occasions and the dealer informed the contact that the AUTO-STOP function was unprogrammed due to the weather however, the dealer was unable to duplicate the failure. The dealer reprogrammed the AUTO-STOP software and tire pressure sensor however, the failure recurred. The manufacturer was made aware of the failure and the contact was awaiting a callback. The failure mileage was approximately 5,000.

9/10/2021

I had a smell of gasoline inside and under hood of 2021 Trailblazer LT 1.3l. Took to Chevrolet dealer.Confirmed gas odor. Gas was leaking from fuel rail.Sevice manager said it was pouring out. Found out GM has Service bulliten for this PIP5765 that covers both Chevy Trailblazer with 1.3l and Buick Encore GX with 1.3l motors. This has been a scary situation considering gas fumes could have caught fire.

1/28/2022

23 more complaints are available in this category.

FUEL/PROPULSION SYSTEM

16 Reports7% of total

Previewing the first 2 complaint summaries.

I had a smell of gasoline inside and under hood of 2021 Trailblazer LT 1.3l. Took to Chevrolet dealer.Confirmed gas odor. Gas was leaking from fuel rail.Sevice manager said it was pouring out. Found out GM has Service bulliten for this PIP5765 that covers both Chevy Trailblazer with 1.3l and Buick Encore GX with 1.3l motors. This has been a scary situation considering gas fumes could have caught fire.

1/28/2022

3 times in the last year while we were driving the acceleration wen very high like from 50 to all of a sudden went up to about 80. I had to stand on the brake and try to pull over. Still accelerating I put it in park and shut it off. When you restart it it drive fine again. This has happened three times and the dealership says they can't find a problem. We are stuck driving a death trap. Please help. They wanna charge diagnosis everything I take it in. Then they say they can't find nothing. Now I am finding others that have had same issue and dealership says there is no problem. This has got to be destroying the engine reving at such high speeds.

8/21/2022

14 more complaints are available in this category.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

7 Reports3% of total

Previewing the first 2 complaint summaries.

THE BRAKES INCLUDING BRAKE ASSIST STOPPED WORKING. PRESSING THE BRAKE PEDAL DID LITTLE TO STOP THE VEHICLE. THERE WAS RECALL FOR THIS SAME ISSUE THAT WAS PREFORMED BY THE DEALERSHIP 3 WEEKS AGO.

2/6/2021

Was in the middle of a 3 car collision. After about 5 min engine started smoking and a fire started. Fire slowly escalated and fully engulfed the entire car.

9/6/2021

5 more complaints are available in this category.

STRUCTURE:BODY

6 Reports3% of total

Previewing the first 2 complaint summaries.

PURCHASED ON 7/24/20. ON 8/1, FOUND A DEFECT SPOT ON GRILL. DEALERSHIP ORDERED NEW GRILL. ON 8/9, NOTICED PAINT BUBBLING/PEELING ON HOOD. 8/15 - 8/20, DEALERSHIP HAD GRILL REPLACED AND HOOD PAINTED. 8/21, NOTICED HOOD NOT PAINTED COMPLETELY. 8/24 - 8/28, DEALERSHIP HAD VEHICLE TO REPAINT HOOD. 9/17 FOUND FENDER CLIPS ON FRONT PASSENGER SIDE MISSING.10/2 BACK TO HAVE CLIPS INSTALLED. DEALER DIDN'T ORDER ENOUGH CLIPS SO WAITING ON MORE CLIPS TO ARRIVE. 10/16 BACK TO HAVE REMAINING CLIPS INSTALLED. 10/27 NOTICED PAINT PEELING UNDER PASSENGER SIDE HEADLIGHT. I HAVE AN OPEN CLAIM WITH GM REGARDING ALL OF THIS.

10/28/2020

I was driving on the freeway and my panoramic moonroof literally exploded from the inside out. It sounded like a gunshot almost. Then the glass shattered. I am glad that the screen was closed otherwise all the glass would have gotten in my car.

10/3/2021

4 more complaints are available in this category.

STEERING

6 Reports3% of total

Previewing the first 2 complaint summaries.

I WAS DRIVING MY BRAND NEW 2021 TRAILBLAZER (ONLY 160 MILES) AND STEPPED ON THE BRAKE TO STOP AT THE END OF A STREET. SUDDENLY, I GOT ALERTS THAT MY BRAKE SYSTEM HAD FAILED AND RIGHT AFTER THAT, ANOTHER ONE, SAYING THAT THE POWER STEERING NEEDED TO BE SERVICED. AT THAT POINT, IT REQUIRED MUCH MORE PRESSURE ON THE BRAKE TO STOP, AND THE BRAKES DIDN'T SEEM VERY RESPONSIVE. LATER I SHUT OFF THE ENGINE, AND WHEN I STARTED IT AGAIN, THE CHECK ENGINE LIGHT WAS STILL ON, BUT I THINK THE BRAKES WERE WORKING AGAIN. I'M NOT SURE BECAUSE I DIDN'T WANT TO DRIVE IT, JUST IN CASE.

5/6/2021

I have had the 2021 Chevy Trailblazer since May 2021, it has been 15 months, not even a year and a half off the lot and i have had wayyyy too many problems. I have has service the stabilitrak stability control system, service the antilock breaking system multiple times within the first 8-10 months. I had to get a part replaced due to that. The dealership had my vehicle literally for a month after i bought it, had an open tak report through Gm due to my engine light coming on. Gm did not know why it was happening. Had 2 service engine and transmission system alerts. I have had a fuel injector and line replaced as well within the first 6 months. I have had to get the system updated 2 times also. Now August 2022 im having service battery, or starter. Have had my vehicle shut off on me at an intersection then come back on two different times. My breaks have been squealing ever since i got this vehicle. Dealership confirms everything is in good standing. I have not had a vehicle where breaks squeal when i am coming to a stop or backing out of my driveway constantly. Dealership keeps saying oh its just probably dust or dirt, spray them out and it should stop. But, it has not for about a year now! Unbelievable! I am going it to trade this vehicle in. This is wayyy too much to be dealing with when you pay $30 grand on a vehicle!

8/29/2022

4 more complaints are available in this category.

VEHICLE SPEED CONTROL

5 Reports2% of total

Previewing the first 2 complaint summaries.

TL* THE CONTACT OWNS A 2021 CHEVROLET TRAILBLAZER. THE CONTACT STATED THAT UPON ATTEMPTING TO PARK HER VEHICLE AT 5 MPH, THE VEHICLE INDEPENDENTLY ACCELERATED FORWARD WITHOUT WARNING, JUMPED THE PARKING MEDIAN AND CRASHED INTO A BUILDING. THE AIR BAGS DID DEPLOY UPON IMPACT. THE CONTACT SUSTAINED MINOR BRUISING FROM HER LAP BELT BUT DID NOT NEED MEDICAL ATTENTION. THE AUTHORITIES ARRIVED AT THE SCENE AND A POLICE REPORT WAS FILED. DUE TO THE FAILURE, THE VEHICLE WAS TOWED TO SID DILLON CHEVROLET - FREMONT(2500 E 23RD ST, FREMONT, NE 68025) WHERE IT HAD REMAINED IN THEIR POSSESSION TO DETERMINE THE FAILURE. THE MANUFACTURER HAD YET TO BE NOTIFIED OF THE FAILURE. THE VEHICLE HAD YET TO BE REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 6,000. *JB

11/23/2020

3 times in the last year while we were driving the acceleration wen very high like from 50 to all of a sudden went up to about 80. I had to stand on the brake and try to pull over. Still accelerating I put it in park and shut it off. When you restart it it drive fine again. This has happened three times and the dealership says they can't find a problem. We are stuck driving a death trap. Please help. They wanna charge diagnosis everything I take it in. Then they say they can't find nothing. Now I am finding others that have had same issue and dealership says there is no problem. This has got to be destroying the engine reving at such high speeds.

8/21/2022

3 more complaints are available in this category.

VISIBILITY/WIPER

4 Reports2% of total

Previewing the first 2 complaint summaries.

WHEN IT IS DARK OUTSIDE AND YOU PUT THE VEHICLE IN REVERSE, THE LIGHTS NEXT TO THE BACK UP CAMERA CAUSES THE SCREEN INSIDE THE CAR TO SHOW BRIGHT WHITE. THERE IS NO WAY TO SHUT THE SCREEN OFF WHEN IN REVERSE. I HAVE TURNED THE BRIGHTNESS ALL THE WAY DOWN BUT IT IS STILL VERY BRIGHT MAKING IT IMPOSSIBLE TO SEE YOUR SURROUNDINGS SAFELY. I HAVE ALMOST HIT A TREE AND DROVE INTO A DITCH TRYING TO REVERSE AT DARK. THIS IS VERY DANGEROUS AND NEEDS TO BE FIXED.

9/13/2020

Wiper system failed. No function of front wipers. Issue occurred on freeway, in heavy rain conditions, with fast moving traffic surrounding. Visibility with the inability to clear the windshield was at a minimum or not possible. Required pulling over, could have easily caused collision with no forward vision. Vehicle is currently at a dealership for evaluation. Previously brought into dealership, “no problem found” reported by the dealership mechanics. Three separate occurrences of this issue. No other warnings or lights associated.

4/11/2023

2 more complaints are available in this category.

FORWARD COLLISION AVOIDANCE: WARNINGS

4 Reports2% of total

Previewing the first 2 complaint summaries.

Purchased my 2021 Chevy Trailblazer in August 2021 with less than 100 miles. After about 500 miles the Lane assist, forward collision assistant and the automatic breaking features all stopped working. Factory reset has been set several times with no fix. The buttons on the steering wheel do not do anything when pressed. I have been told by the dealership they will need to keep my car for at least 3 days to disassemble and trouble shoot the issue, however they do not have a rental to provide me in the mean time. I am now at around 10K miles because this is my daily driving and only vehicle. I am not comfortable that some of the safety features have stopped working and fear that any day something else could stop working that is more important to the functioning of the car.

2/9/2022

Someone pulled out in front of me going 45 mph and totaled my car when they smashed into the front drivers side of my vehicle. My airbags didn’t deploy and no warning notifications or emergency braking ever occurred. This is dangerous and was severe enough to total my vehicle. My airbags should have deployed. No warning lights or any other issues when it occurred. It was inspected by insurance and determined a total loss.

12/17/2022

2 more complaints are available in this category.

AIR BAGS

3 Reports1% of total

Previewing the first 2 complaint summaries.

On June 10, 2021 I was driving home at a speed of approx 65 miles an hour from the grocery store on Interstate 255 when all my side airbags suddenly exploded. My 2021 Chevy Trailblazer RS was 3 months old and had 3500 miles on the car. After exiting the vehicle, I found the rear passenger tire was flat. Upon changing the tire, we discovered that the wheel had split apart. There is no damage to the body or underneath the vehicle. There was no large potholes or debris anywhere in the area. Upon starting the investigation with GM regarding the incident, they reported that the air bags acted as they should and they would not take liability. When both myself and the service manager of the dealership questioned why the report had not one single mention of the tire/wheel which caused the deployment of the airbags in the entire investigative report, we were both told "the airbags acted as they should" and the decision was final. The service manager was in shock and has stated repeatedly that based on the facts gathered and condition of the tire/wheel, there was some sort of defect in the wheel which caused it to explode. There is absolutely no evidence to make him think that I hit anything or caused the incident. GM will not discuss the case any further and told me to turn it over to my insurance. The fact that they did not investigate the cause (the exploding of a wheel for no apparent reason) makes me believe they are trying to cover up a potential issue that could impact the safety of other 2021 Trailblazer owners. The air bag replacements are on backorder and are predicted to take months. I am currently without a vehicle.

7/31/2021

Someone pulled out in front of me going 45 mph and totaled my car when they smashed into the front drivers side of my vehicle. My airbags didn’t deploy and no warning notifications or emergency braking ever occurred. This is dangerous and was severe enough to total my vehicle. My airbags should have deployed. No warning lights or any other issues when it occurred. It was inspected by insurance and determined a total loss.

12/17/2022

1 more complaint is available in this category.

WHEELS

3 Reports1% of total

Previewing the first 2 complaint summaries.

On June 10, 2021 I was driving home at a speed of approx 65 miles an hour from the grocery store on Interstate 255 when all my side airbags suddenly exploded. My 2021 Chevy Trailblazer RS was 3 months old and had 3500 miles on the car. After exiting the vehicle, I found the rear passenger tire was flat. Upon changing the tire, we discovered that the wheel had split apart. There is no damage to the body or underneath the vehicle. There was no large potholes or debris anywhere in the area. Upon starting the investigation with GM regarding the incident, they reported that the air bags acted as they should and they would not take liability. When both myself and the service manager of the dealership questioned why the report had not one single mention of the tire/wheel which caused the deployment of the airbags in the entire investigative report, we were both told "the airbags acted as they should" and the decision was final. The service manager was in shock and has stated repeatedly that based on the facts gathered and condition of the tire/wheel, there was some sort of defect in the wheel which caused it to explode. There is absolutely no evidence to make him think that I hit anything or caused the incident. GM will not discuss the case any further and told me to turn it over to my insurance. The fact that they did not investigate the cause (the exploding of a wheel for no apparent reason) makes me believe they are trying to cover up a potential issue that could impact the safety of other 2021 Trailblazer owners. The air bag replacements are on backorder and are predicted to take months. I am currently without a vehicle.

7/31/2021

I have had multiple issues with the car since I've purchased it. The brakes continuously make noise, and the automatic Emergency Braking DOES not work. The tire pressure sensors don't work, they have the wrong tire pressure for each tire, and the tires constantly over inflate. Also, my front bumper is coming off. I've taken it to the dealership for all of these things, the dealership said the brakes seem fine, the front bumper clips seem to have warn down for some reason, and that they reset my tire pressure. There was no permanent solution. They put a band aid on my problem and I still have all of these issues.

12/19/2021

1 more complaint is available in this category.

EQUIPMENT

2 Reports1% of total

Previewing the first 2 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact received notification of NHTSA Campaign Number: 21V440000 (Equipment) however, the part to the recall repair was unavailable. The contact took the vehicle to the local dealer and it was confirmed that the part was not available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

10/4/2021

The contact owns a 2021 Chevrolet Trailblazer. The contact received notification of NHTSA Campaign Number: 21V440000 (Equipment). The contact called a local dealer and was informed that the only resolution for the recall would be to remove the jack stand inside the vehicle. The contact was informed that the jack stand would not be replaced. The manufacturer was not made aware of the issue. The vehicle was not yet serviced under the recall. The contact had not experienced a failure. Parts distribution disconnect.

11/22/2021

LANE DEPARTURE: ASSIST

2 Reports1% of total

Previewing the first 2 complaint summaries.

Purchased my 2021 Chevy Trailblazer in August 2021 with less than 100 miles. After about 500 miles the Lane assist, forward collision assistant and the automatic breaking features all stopped working. Factory reset has been set several times with no fix. The buttons on the steering wheel do not do anything when pressed. I have been told by the dealership they will need to keep my car for at least 3 days to disassemble and trouble shoot the issue, however they do not have a rental to provide me in the mean time. I am now at around 10K miles because this is my daily driving and only vehicle. I am not comfortable that some of the safety features have stopped working and fear that any day something else could stop working that is more important to the functioning of the car.

2/9/2022

While traveling down the road at approximatly 35-40 mph with my two minor children, the steering was not responding properly and the car kept attempting to veer to the right. I let off the gas to slow down since the brakes were also not seeming to respond well. Upon attempting to brake and execute a left hand turn, the car would not turn at all despite the steering wheel being as turned as far to the left as possible, the lights began flashing on the dashboard for "PowerSteering" ESC warning. We ended up going through the intersection without stopping and narrowly missed another car in intersection and went completely off the road into a snowbank. Fortunately we were not injured. We drove the vehicle back home (approximately one mile) by overpowering the steering and manually forcing the car to stay on the road. Throughout the lane assist kept attempting to autocorrect and drive us off the road. The car was damaged by the impact and the mechanic said that the tie rod is bent and has no idea what could have caused this to happen. I am somehow now responsible for the situation. I have asked what caused the power steering to fail, and Chevy claims that they have no record of any power steering issues (which research has shown to be untrue) and in order to determine IF it failed and/or why, they need to make the repair and then run additional tests to re-create the issue. This car only has 21,000 miles on it, and has never been in an accident before this.

1/5/2023

EXTERIOR LIGHTING

1 Report0% of total

Previewing the first 1 complaint summaries.

WHEN IT IS DARK OUTSIDE AND YOU PUT THE VEHICLE IN REVERSE, THE LIGHTS NEXT TO THE BACK UP CAMERA CAUSES THE SCREEN INSIDE THE CAR TO SHOW BRIGHT WHITE. THERE IS NO WAY TO SHUT THE SCREEN OFF WHEN IN REVERSE. I HAVE TURNED THE BRIGHTNESS ALL THE WAY DOWN BUT IT IS STILL VERY BRIGHT MAKING IT IMPOSSIBLE TO SEE YOUR SURROUNDINGS SAFELY. I HAVE ALMOST HIT A TREE AND DROVE INTO A DITCH TRYING TO REVERSE AT DARK. THIS IS VERY DANGEROUS AND NEEDS TO BE FIXED.

9/13/2020

TIRES

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer equipped with Continental tires, Tire Line: Pro Contact, Tire Size: 225/60/R17, DOT Number: 16YOF98YW. The contact stated that while his son was driving at an undisclosed speed, the tire pressure warning light was illuminated then the front passenger side tire had a blowout. The contact's son pulled over on the side of the road and contacted a tow truck company for assistance. The tow truck driver replaced the tire with the spare tire. The dealer was made aware of the failure but informed the contact that there was no defect with the tire. The manufacturer was not made aware of the failure. The failure mileage was 2,100.

7/16/2021

TIRES:SIDEWALL

1 Report0% of total

Previewing the first 1 complaint summaries.

225/60R17 99H Bought trailblazer brand new from dealer March 2021. I've owned many cars, street cars, etc. I've never had a tire with 10K miles develop a bulge in the side. I took back to dealer as warranty book showed covered to 12K, but they said 'upon inspecting, it appears from a pothole'. That was strange to me, as we never hit anything or the rim does not have a mark or bent or anything.

11/24/2021

STRUCTURE:BODY:HATCHBACK/LIFTGATE

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while outside the vehicle, the power liftgate opened and closed independently. The liftgate struck the driver on the head. The vehicle was taken to the local dealer but the vehicle was not diagnosed or repaired. The manufacturer was notified of the failure but no additional assistance was provided. The approximate failure mileage was 5. The contact stated that this issue happens a lot and at any time.

5/3/2022

BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING

1 Report0% of total

Previewing the first 1 complaint summaries.

Shortage in radio according to Chevrolet's diagnostic. Caused black screen, no back up camera, no beeping when in reverse and coming close to another object, no sound when blinkers or hazard lights are on, no radio, no power to front charger, no ability to use front auxiliary cable. Initially a loud buzzing noise which could not be controlled by the volume dial. Problems began on or around October 7, 2022. Purchase was made September 2020. Vehicle is available for inspection upon request. Problem can be reproduced/is constant. Problem was reproduced by dealer. Vehicle was inspected by dealer. There were no other warning lamps.

11/23/2022

FUEL SYSTEM, GASOLINE

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while driving at various speeds, an abnormal fuel odor was coming from the vehicle, without warning. While in traffic, the contact started feeling dizzy and pulled over. The contact’s son who was following her vehicle, also stated that he could smell fuel upon approaching the vehicle. The following day, the vehicle was taken to a dealer where the mechanic discovered a crack in the fuel rail. Upon investigation, the contact discovered Service Bulletin: PIP5765, which she linked to the failure. The manufacturer was notified of the failure, and the contact was provided a case number. The vehicle was not repaired. The failure mileage was approximately 21,000.

4/10/2023

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

1 Report0% of total

Previewing the first 1 complaint summaries.

Brakes failed and myself and others were in harms way. To my knowledge the car was totaled as the air bags did deploy.

6/20/2023

STRUCTURE:BODY:DOOR

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that during inclement weather, water accumulated inside all four door panels. The contact stated no warning light was illuminated. The vehicle was taken to the local dealer and the contact was informed that the failure was common in the year, make, and model vehicle. The vehicle was not repaired. The manufacturer had been informed of the failure. The failure mileage was 23,520.

7/14/2023

BACK OVER PREVENTION

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while operating the vehicle at night, while reversing the vehicle, the back-up camera image became extremely bright creating a visibility hazard for the driver. The contact stated that the display screen was too bright to see images at the rear of the vehicle. Additionally, while driving at an undisclosed speed, there was an extremely loud audible squealing sound inside the cabin of the vehicle. The contact stated that after a while, the vehicle ceased. The cause of the failure was not yet determined. The manufacturer and local dealer were not notified of the failure. The failure mileage was 32,000.

12/22/2023

TETHER, LOWER ANCHOR (ON CAR SEAT OR VEHICLE)

1 Report0% of total

Previewing the first 1 complaint summaries.

My issue is with the vehicle's car seat latches. The latches in the Chevy Trailblazer (Manufactured) are designed in a way that is unsafe and also hard to install a car seat for children who are 2 and under or under 40 pounds. Car seat safety is important for all children as it could lead to damages of the head, neck, and or spine. I have installed 4 car seats in my vehicle (Chevy Trailblazer) with it being difficult but overcoming the problem. However, the car seat detaches itself due to the location of the latch (Vertically Slanted). After using the car seat multiple times, it cannot withstand the tension due to the location of the latch which then releases itself from the latch, potentially allowing for more problems to occur and is concerning for the safety of a child. I have, as of now, not have to deal with this problem with other manufacturers like Toyota, Kia, Tesla, Volkswagen, and Honda, where the latch is horizontal. The latch on GMs Vehicles is Vertically Slanted and located left or right of the manufacturers noted car seat latch display/button on the seat. I have only seen the Chevy Trailblazer (My Vehicle) and the GMC Yukon with this problem. I am sure there are others.

3/8/2024

CHILD SEAT:VEHICLE LATCH ANCHOR

1 Report0% of total

Previewing the first 1 complaint summaries.

there are no tethering clips at the base of the rear seat to secure a child's car seat. The bottom of the rear seat shows they should be there but the dealer confirms they are not . This is an immediate and dangerous problem and puts any child in a car seat in a chevy trail blazer at risk. Not sure how I'm going to secure the granddaughter's car seat safely .

3/18/2024

SUSPENSION

1 Report0% of total

Previewing the first 1 complaint summaries.

The rear shocks on the 2021 trailblazer are faulty and are blowing out causing the rear tires to bounce and eat away at the tread exposing cords becoming a safety hazard. The rear shocks blowing out is happening on several 2021 Trailblazers causing there to be a national back order leaving these vehicles and drivers to be at risk of serious accidents and injuries.

9/24/2024

INSERT, PADDING

1 Report0% of total

Previewing the first 1 complaint summaries.

Model # CC398GYU, purchased in April of 2024 needs to be included in the foam head rest recall because the foam is accessible by my toddler. The foam presents a choking hazard. It is not secure and the foam is exposed.

4/25/2025

ELECTRICAL SYSTEM:IGNITION:INTERLOCK/LOCKOUT

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated that while attempting to remove the key from the ignition, the key remained stuck in the ignition cylinder. The contact had to turn off and restart the vehicle several times to be able to remove the key. The contact stated that the failure occurred intermittently. The vehicle was taken to the dealer who sprayed the ignition cylinder to clean the cylinder; however, the failure persisted. The vehicle was returned to the dealer who diagnosed that the shift lock mechanism failed to recognize that the vehicle was in park(P). The shifter assembly was replaced. The manufacturer was informed of the failure and opened a case. The manufacturer referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 20,000.

6/5/2025

ENGINE AND ENGINE COOLING

1 Report0% of total

Previewing the first 1 complaint summaries.

The contact owns a 2021 Chevrolet Trailblazer. The contact stated while driving at an undisclosed speed, the vehicle inadvertently lost motive power and was unable to accelerate above 40 MPH. The contact stated that after the failure, the vehicle went into LIMP Mode. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the variable valve timing system. Additionally, the dealer found that the intake camshaft actuator was incorrectly positioned, resulting in damages to the exhaust camshaft. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling), but the VIN was not included. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 81,000.

6/11/2025

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

1 Report0% of total

Previewing the first 1 complaint summaries.

vThe contact owns a 2021 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from the vehicle. No warning lights were illuminated. The vehicle was taken to the dealer, where it was diagnosed with a crack between the muffler and front pipe. The contact was informed that the muffler needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 57,850.

8/6/2025

About This Data

Data and Methodology

MethodologyHow we score →

Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.

FAQ

What are the most common owner complaints for the 2021 Chevrolet Trailblazer?

The most reported complaint category for the 2021 Chevrolet Trailblazer is UNKNOWN OR OTHER, with 36 owner reports. That is about 16% of all complaints logged here. Other recurring themes include UNKNOWN OR OTHER, POWER TRAIN, ELECTRICAL SYSTEM.

Are complaints about the 2021 Chevrolet Trailblazer a serious warning sign?

Potentially. 111 complaint reports fall into higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components. That does not prove every vehicle has a defect, but repeated complaints in those systems justify a more careful pre-purchase inspection.

How should buyers use complaint data for the 2021 Chevrolet Trailblazer?

Use complaints as an early pattern to investigate, not a standalone verdict. Start with the top complaint categories, compare those themes against the recall report and maintenance guide, then inspect service records for evidence that the same problem areas were already addressed. If the same issue appears repeatedly across complaints and recalls, treat it as a real ownership-risk flag.

Are complaints about the 2021 Chevrolet Trailblazer severe?

111 complaint reports involve higher-attention systems such as brakes, steering, engine, powertrain, fuel, suspension, airbags, or electrical components, which is enough to justify a focused inspection before purchase.

Complaint list entries are sourced from owner-submitted NHTSA ODI records.

Read complaint summaries

Chevrolet Trailblazer: How should complaint data influence buying decisions?

Use complaint patterns together with recalls and maintenance guidance to estimate ownership risk and inspection priorities.

Carfocal links complaint data directly to recall and maintenance routes for the same model year.

Return to full vehicle report
Complaint entries
223
Top-topic view
5 grouped topics shown
Primary source
NHTSA ODI owner complaint records

We may earn a commission via links on this page.

In this guide

  1. 01Overview
  2. 02Common Problems
  3. 03Owner Complaints
  4. 04Data and Methodology

Start here

Buyer guideMaintenance guideRecall report

Get recall and ownership alerts for the 2021 Chevrolet Trailblazer

Get our free model-year alerts and ownership updates.

Sign Up

We may earn a commission if you buy parts through our links. Learn more.

Carfocal

Automotive Research

Real data on vehicle reliability, safety, and ownership costs.

  • Used Car Research
  • Reliability Rankings
  • Buying Guides

  • Data Sources & Methodology
  • Editorial Standards
  • Contact
  • Privacy Policy
  • Legal Disclosures
  • Terms of Service

© 2026 Carfocal · All Rights Reserved