2012 GMC Sierra Owner Complaints
Complaint Summary
The 2012 GMC Sierra has 46 reported complaints.
- Top issues involve electrical system and structure:body.
Reliability Score
Reliability Score
Based on 46 complaints
Most Frequent Issues
ELECTRICAL SYSTEM
6 13%
STRUCTURE:BODY
5 10.9%
ENGINE
5 10.9%
AIR BAGS
4 8.7%
STEERING
3 6.5%
Quick Insights
The top category is ELECTRICAL SYSTEM, accounting for 13% of all complaints.
Owners have reported issues across 20 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.
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What owners keep reporting on the 2012 GMC Sierra
The 2012 GMC Sierra has 46 owner complaints in this dataset. ELECTRICAL SYSTEM is the most common complaint category, representing about 13% of the reports shown here.
Most common complaint categories
The top complaint groups for the 2012 GMC Sierra are ELECTRICAL SYSTEM (6), STRUCTURE:BODY (5), ENGINE (5).
Are these complaints a serious red flag?
Potentially. 26 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 2012 GMC Sierra?
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.
Detailed Complaint Log
Showing 20 of 20 systems
ELECTRICAL SYSTEM
6 Reports13% of totalPreviewing the first 2 complaint summaries.
VEHICLE WAS TAKEN TO GMC DEALER FOR HEADLIGHT DEFECT AND WE WERE INFORMED THAT THEY WOULD HAVE TO ORDER PARTS. DROVE TRUCK BACK TO SITE AND WHILE TRUCK WAS RUNNING BUT STATIONARY SMOKE WAS OBSERVED COMING FROM THE ENGINE COMPARTMENT. WHEN THE HOOD WAS RAISED THE ENTIRE TRUCK BECAME ENGULFED AND COMPLETELY BURNED. *TR
10/17/2012
APPARENTLY GM USES PEANUT OIL TO LUBRICATE WIRING SO THEY CAN MORE EASILY INSULATE, ETC (ACCORGING TO THE GM DEALER). THIS ATTRACTS RATS AND MICE WHICH CHEW UP THE WIRING - POTENTIALLY IMPACTING SENSORS AND OTHER ITEMS CONTROLLING CRUISE, STABILITY/TRACTION CONTROL, AND ANY NUMBER OF ELECTRICAL SYSTEMS THAT THE DRIVER MAY BE RELYING UPON FOR SAFETY. I ACTUALLY HAD MAP SENSOR WIRES CHEWED UP THAT DISABLED MY STABILITY/TRACTION SYSTEMS AND INHIBITED ENGINE PERFORMANCE. LUCKILY FOR ME IT HAPPENED IN MY DRIVEWAY RATHER THAN ON THE HIGHWAY. DEALER CLAIMS IT IS NOT WARRANTY ITEM EVEN THOUGH CAUSED BY A PROCESS THAT GM ELECTS TO USE IN BUILDING THE VEHICLE. THIS COULD IMPACT ANY/EVERY VEHICLE THAT GM BUILDS WITH USE OF PEANUT OIL (MAY INDEED BE ALL OF THEIR MODELS). *TR
1/4/2013
STRUCTURE:BODY
5 Reports11% of totalPreviewing the first 2 complaint summaries.
VEHICLE WAS TAKEN TO GMC DEALER FOR HEADLIGHT DEFECT AND WE WERE INFORMED THAT THEY WOULD HAVE TO ORDER PARTS. DROVE TRUCK BACK TO SITE AND WHILE TRUCK WAS RUNNING BUT STATIONARY SMOKE WAS OBSERVED COMING FROM THE ENGINE COMPARTMENT. WHEN THE HOOD WAS RAISED THE ENTIRE TRUCK BECAME ENGULFED AND COMPLETELY BURNED. *TR
10/17/2012
WHILE THE VEHICLE WAS BEING DRIVEN, IT JUST WENT DEAD, NO ENGINE, NO ELECTRIC, NO NOTHING. THE VEHICLE WAS LEFT IN PLACE AND AT SOME POINT, CAUGHT FIRE AND BURNED. A TOTAL LOSS. TO DATE, THE INSURANCE COMPANY HAS NOT PAID ME FOR MY LOSS BUT RATHER HAS GONE TO GREAT LENGTHS TO INVESTIGATE ME PERSONALLY, LOOKING FOR ANY REASON TO NOT PAY. SO, I'VE BEEN MAKING TWO VEHICLE PAYMENTS FOR THE LAST 8 MONTHS. AS A RESULT, I AM STRUGGLING FINANCIALLY. *TR
3/30/2014
ENGINE
5 Reports11% of totalPreviewing the first 2 complaint summaries.
VEHICLE WAS TAKEN TO GMC DEALER FOR HEADLIGHT DEFECT AND WE WERE INFORMED THAT THEY WOULD HAVE TO ORDER PARTS. DROVE TRUCK BACK TO SITE AND WHILE TRUCK WAS RUNNING BUT STATIONARY SMOKE WAS OBSERVED COMING FROM THE ENGINE COMPARTMENT. WHEN THE HOOD WAS RAISED THE ENTIRE TRUCK BECAME ENGULFED AND COMPLETELY BURNED. *TR
10/17/2012
APPARENTLY GM USES PEANUT OIL TO LUBRICATE WIRING SO THEY CAN MORE EASILY INSULATE, ETC (ACCORGING TO THE GM DEALER). THIS ATTRACTS RATS AND MICE WHICH CHEW UP THE WIRING - POTENTIALLY IMPACTING SENSORS AND OTHER ITEMS CONTROLLING CRUISE, STABILITY/TRACTION CONTROL, AND ANY NUMBER OF ELECTRICAL SYSTEMS THAT THE DRIVER MAY BE RELYING UPON FOR SAFETY. I ACTUALLY HAD MAP SENSOR WIRES CHEWED UP THAT DISABLED MY STABILITY/TRACTION SYSTEMS AND INHIBITED ENGINE PERFORMANCE. LUCKILY FOR ME IT HAPPENED IN MY DRIVEWAY RATHER THAN ON THE HIGHWAY. DEALER CLAIMS IT IS NOT WARRANTY ITEM EVEN THOUGH CAUSED BY A PROCESS THAT GM ELECTS TO USE IN BUILDING THE VEHICLE. THIS COULD IMPACT ANY/EVERY VEHICLE THAT GM BUILDS WITH USE OF PEANUT OIL (MAY INDEED BE ALL OF THEIR MODELS). *TR
1/4/2013
AIR BAGS
4 Reports9% of totalPreviewing the first 2 complaint summaries.
TL* THE CONTACT OWNS A 2012 GMC SIERRA. THE CONTACT STATED THAT WHILE MAKING A RIGHT TURN, THE DRIVER FRONT AIR BAG ERRONEOUSLY DEPLOYED AND CAUSED THE CONTACT TO CRASH INTO A POLE. THE VEHICLE WAS DESTROYED BUT THERE WERE NO INJURIES. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 6,700. THE VIN WAS UNAVAILABLE.
3/8/2013
THE DASH THAT SUPPORTS THE AIR BAG ON THE PASSENGER SIDE IS CRACKING AND COULD POSSIBLY PUNCTURE THE AIR BAG OR SEND PARTS OF THE DASH FLYING A OCCUPANTS DURING A COLLISION. BECAUSE OF THE CRACKS THE AIR BAG IS NOT PROPERLY SECURED IN THE VEHICLE.
10/27/2015
STEERING
3 Reports7% of totalPreviewing the first 2 complaint summaries.
JUST PURCHASES NEW 2012 GMC SIERRA 3500 , 400 MILES , HAVE HAD ALIGNMENT / STEERING PROBLEMS WITH A DRIFT TO LEFT AND A WONDERING STEERING WHEEL, ALSO BRAKE AND ABS LIGHTS ON, WENT TO DEALER THEY LOOKED AT IT FOR 2 HRS, AND SAID IT NEEDED A PART ORDERED AND THERE WAS A TSB ON IT, THE TECH SAID IT WOULD BE SAFE TO DRIVE BUT I WOULD NOT HAVE ABS BRAKES, ALSO HE WOULD CHECK ALIGNMENT AGAIN AT TIME WHEN PART CAME IN 4 DAYS EST, BRAKE AND ABS LIGHT REMAINED ON, VEHICLE DROVE FINE THE NEXT DAY UNTIL A ACCIDENT, WENT AROUND CURVEAT 55 MPH, APPLIED BRAKES TO SLOW, BRAKES WENT TO FLOOR UN ABLE TO SLOW AT ALL WENT OFF THE ROAD LOST CONTROL AND CRASHED INTO TREES, BOTH AIRBAGS DEPLOYED , WENT TO EMERGENCY ROOM WITH ARM INJURY AND RIB INJURIES, BRAND NEW TRUCK VERY SCARRY I WILL NEVER BUY A GM PODUCT AGAIN. *TR
3/14/2012
TL* THE CONTACT OWNS A 2012 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, THE RIGHT AND LEFT TURN SIGNAL AND SAFETY BELT CHIME STOPPED WORKING. ALSO, THE RADIO MALFUNCTIONED AND THE VEHICLE VEERED TO THE RIGHT. THE MANUFACTURER WAS NOT CONTACTED AND THE VEHICLE WAS NOT DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 60,000 AND THE CURRENT MILEAGE WAS 65,274. UPDATED 10/2/14*CN THE CONSUMER STATED THAT THE INTERIOR LIGHTS ALSO WENT OUT. THE VEHICLE WAS REPAIRED UNDER RECALL. UPDATED 3/9/15 *JS
7/10/2014
SERVICE BRAKES
3 Reports7% of totalPreviewing the first 2 complaint summaries.
PULLING INTO A PARKING SPOT IN A PARKING GARAGE GOING NO MORE THAN 3 MILES PER HOUR, OR HOWEVER FAST THIS VEHICLE CAN GO WHILE FOOT IS RESTING ON BRAKE, GETTING READY TO FULLY BRAKE. AS I PRESSED DOWN ON BRAKE TO STOP, THE VEHICLE CONTINUED AS IF THE ANTI-LOCK BRAKE SYSTEM SLIPPED, CAUSING THE TRUCK TO DRIVE FORWARD CRASHING THROUGH THE SHEETROCK WALL AND FINALLY STOPPING AFTER HITTING THE GLASS WINDOWS. TWO WEEKS LATER, AFTER ALL COSMETIC REPAIRS WERE DONE, THE VEHICLE DID THE SAME THING IN ANOTHER PARKING LOT, BUT LUCKILY BROKE BEFORE HITTING THE CURB AND LIGHT POST. I DID FEEL UNDER MY FOOT ON THE BRAKE PEDDLE, AS I PRESSED DOWN TO STOP, A SLIP OF SOME SORT WHICH AT THE SAME TIME CAUSED THE VEHICLE TO PUSH FORWARD RIGHT BEFORE STOPPING. THIS IS DEFINITELY A MALFUNCTION OF SOME SORT WITH THE ANTI-LOCK BRAKE SYSTEM. *TR
7/23/2014
THE FUEL INJECTION PUMP CP4 HAD A CATASTROPHIC FAILURE AS I WAS DRIVING ON A HEAVILY TRAVELED FOUR LANE HIGHWAY, US RT.20. I LOST POWER STEERING AND BRAKES. I FELT FORTUNATE THAT I WAS NOT TOWING A 16,000 LB. FIFTH WHEEL CAMPER DOWN A MOUNTAIN ROAD.I SAY THIS BECAUSE IT WAS EXTREMELY DIFFICULT TO MAINTAIN CONTROL OVER THE TRUCK STEERING IT AND BRINGING IT TO A CONTROLLED STOP. I HAVE READ ABOUT THESE PUMPS FAILING ON NUMEROUS DIESEL FORD AND GM TRUCKS. I ALSO FEEL IF A WOMAN OR SMALL PERSON HAD THIS HAPPEN TO THEM THE OUTCOME COULD END IN LOSS OF CONTROL RESULTING IN INJURIES EVEN DEATHS. THE ONLY ONE THAT KNOWS THE ACTUAL NUMBER OF PUMPS THAT HAVE FAILED IS THE MANUFACTURERS, WHO WILL NOT SHARE THAT INFORMATION WILLINGLY. *JS
2/7/2015
UNKNOWN OR OTHER
3 Reports7% of totalPreviewing the first 2 complaint summaries.
DASH IS CRACKING AROUND MY PASSENGER AIRBAG. THE CRACK IS IN FRONT OF THE PASSENGER AIRBAG CLOSER TO THE WINDSHIELD. VEHICLE ONLY HAS 32,000 MILES BUT IS JUST OUT OF THE 3 YEAR BUMPER TO BUMPER WARRANTY.
11/16/2015
DASHBOARD CRACKING ABOVE INSTRUMENT PANEL.
3/20/2016
SUSPENSION
2 Reports4% of totalPreviewing the first 2 complaint summaries.
JUST PURCHASES NEW 2012 GMC SIERRA 3500 , 400 MILES , HAVE HAD ALIGNMENT / STEERING PROBLEMS WITH A DRIFT TO LEFT AND A WONDERING STEERING WHEEL, ALSO BRAKE AND ABS LIGHTS ON, WENT TO DEALER THEY LOOKED AT IT FOR 2 HRS, AND SAID IT NEEDED A PART ORDERED AND THERE WAS A TSB ON IT, THE TECH SAID IT WOULD BE SAFE TO DRIVE BUT I WOULD NOT HAVE ABS BRAKES, ALSO HE WOULD CHECK ALIGNMENT AGAIN AT TIME WHEN PART CAME IN 4 DAYS EST, BRAKE AND ABS LIGHT REMAINED ON, VEHICLE DROVE FINE THE NEXT DAY UNTIL A ACCIDENT, WENT AROUND CURVEAT 55 MPH, APPLIED BRAKES TO SLOW, BRAKES WENT TO FLOOR UN ABLE TO SLOW AT ALL WENT OFF THE ROAD LOST CONTROL AND CRASHED INTO TREES, BOTH AIRBAGS DEPLOYED , WENT TO EMERGENCY ROOM WITH ARM INJURY AND RIB INJURIES, BRAND NEW TRUCK VERY SCARRY I WILL NEVER BUY A GM PODUCT AGAIN. *TR
3/14/2012
I PURCHASED A 2012 GMC SIERRA DENALI FROM STAHL MOTORS IN MONTEREY, CA IN FEBRUARY OF 2015. THEY ARE NOT WILLING TO PAY FOR THE DAMAGES TO MY TRUCK EVEN THOUGH THEY SOLD ME A COMPLETELY DANGEROUS VEHICLE, WHICH I WILL EXPLAIN. MY TRUCK DIDN'T FEEL RIGHT AS I WAS DRIVING SO I DECIDED TO TAKE IT TO A SHOP TO GET LOOKED AT. THERE IS A LONG LIST OF THINGS THAT IS WRONG WITH THE VEHICLE, BUT I WILL MENTION JUST THE MAIN ONES. THE TRUCK WAS SOLD TO ME WITHOUT THE REAR BRAKES HOOKED UP. THE BRAKE LINES FOR THE REAR CALIPERS WERE CAPPED OFF BY THE REAR DIFFERENTIAL. WHEN THE MECHANIC SHOP DISCOVERED THAT, THEY ALSO DISCOVERED THE MASTER CYLINDER WAS COMPLETELY DRY, WHICH CAUSED DAMAGE TO MY FRONT BRAKES. THERE WAS NO CROSS MEMBER UNDERNEATH THE VEHICLE FROM FRAME TO FRAME. IT WAS TORCHED OUT, THEREFOR LEAVING ZERO SUPPORT FOR THE FRAME OF THE TRUCK AS WELL AS THE FRONT DIFFERENTIAL. WHICH NEEDED TO BE REBUILT CAUSED FROM EXCESSIVE MOVEMENT LEFT TO RIGHT. FRONT DIFFERENTIAL NEEDED TO BE REBUILT CAUSED FROM THE DAMAGE OF NO CROSS MEMBER IN PLACE. BALL JOINTS WERE ALSO AFFECTED (ABOUT TO POP OUT OF CONTROL ARMS) DUE TO WRONG PARTS INSTALLED IN FRONT SUSPENSION OF VEHICLE.
9/1/2015
VEHICLE SPEED CONTROL
2 Reports4% of totalPreviewing the first 2 complaint summaries.
TL* THE CONTACT OWNS A 2012 GMC SIERRA. THE CONTACT STATED THAT WHILE DRIVING UPHILL AND ATTEMPTING TO DECELERATE. THE VEHICLE ACCELERATED ABNORMALLY. IN ORDER TO STOP THE VEHICLE, THE CONTACT ABRUPTLY APPLIED THE BRAKES AS THE ENGINE EXHIBITED A LOUD THUMP. THE CONTACT TOOK THE VEHICLE TO THE DEALER BUT THEY WERE UNABLE TO DUPLICATE THE FAILURE. THE FAILURE AND THE CURRENT MILEAGES WERE 5,545. UPDATED 13/13/12 *CN
10/19/2012
TL* THE CONTACT OWNS A 2012 GMC SIERRA K-1500. THE CONTACT STATED THAT WHILE DRIVING 75 MPH, THE VEHICLE BEGAN TO DECELERATE AS THE WARNING LIGHTS IN THE INSTRUMENT PANEL ILLUMINATED. THE VEHICLE WOULD NOT ACCELERATE BEYOND 35 MPH. THE FAILURE WAS RESOLVED MOMENTARILY AFTER THE VEHICLE WAS RESTARTED BUT SOON RECURRED. THE VEHICLE WAS TAKEN TO THE DEALER, BUT THEY WHERE UNABLE TO DUPLICATE THE FAILURE. THE FAILURE WAS NOT REPORTED TO THE MANUFACTURER. THE FAILURE MILEAGE WAS 7,000. THE CURRENT MILEAGE WAS 20,000. KMJ
6/24/2013
ELECTRONIC STABILITY CONTROL (ESC)
2 Reports4% of totalPreviewing the first 2 complaint summaries.
APPARENTLY GM USES PEANUT OIL TO LUBRICATE WIRING SO THEY CAN MORE EASILY INSULATE, ETC (ACCORGING TO THE GM DEALER). THIS ATTRACTS RATS AND MICE WHICH CHEW UP THE WIRING - POTENTIALLY IMPACTING SENSORS AND OTHER ITEMS CONTROLLING CRUISE, STABILITY/TRACTION CONTROL, AND ANY NUMBER OF ELECTRICAL SYSTEMS THAT THE DRIVER MAY BE RELYING UPON FOR SAFETY. I ACTUALLY HAD MAP SENSOR WIRES CHEWED UP THAT DISABLED MY STABILITY/TRACTION SYSTEMS AND INHIBITED ENGINE PERFORMANCE. LUCKILY FOR ME IT HAPPENED IN MY DRIVEWAY RATHER THAN ON THE HIGHWAY. DEALER CLAIMS IT IS NOT WARRANTY ITEM EVEN THOUGH CAUSED BY A PROCESS THAT GM ELECTS TO USE IN BUILDING THE VEHICLE. THIS COULD IMPACT ANY/EVERY VEHICLE THAT GM BUILDS WITH USE OF PEANUT OIL (MAY INDEED BE ALL OF THEIR MODELS). *TR
1/4/2013
PULLING INTO A PARKING SPOT IN A PARKING GARAGE GOING NO MORE THAN 3 MILES PER HOUR, OR HOWEVER FAST THIS VEHICLE CAN GO WHILE FOOT IS RESTING ON BRAKE, GETTING READY TO FULLY BRAKE. AS I PRESSED DOWN ON BRAKE TO STOP, THE VEHICLE CONTINUED AS IF THE ANTI-LOCK BRAKE SYSTEM SLIPPED, CAUSING THE TRUCK TO DRIVE FORWARD CRASHING THROUGH THE SHEETROCK WALL AND FINALLY STOPPING AFTER HITTING THE GLASS WINDOWS. TWO WEEKS LATER, AFTER ALL COSMETIC REPAIRS WERE DONE, THE VEHICLE DID THE SAME THING IN ANOTHER PARKING LOT, BUT LUCKILY BROKE BEFORE HITTING THE CURB AND LIGHT POST. I DID FEEL UNDER MY FOOT ON THE BRAKE PEDDLE, AS I PRESSED DOWN TO STOP, A SLIP OF SOME SORT WHICH AT THE SAME TIME CAUSED THE VEHICLE TO PUSH FORWARD RIGHT BEFORE STOPPING. THIS IS DEFINITELY A MALFUNCTION OF SOME SORT WITH THE ANTI-LOCK BRAKE SYSTEM. *TR
7/23/2014
POWER TRAIN
2 Reports4% of totalPreviewing the first 2 complaint summaries.
I PURCHASED A 2012 GMC SIERRA DENALI FROM STAHL MOTORS IN MONTEREY, CA IN FEBRUARY OF 2015. THEY ARE NOT WILLING TO PAY FOR THE DAMAGES TO MY TRUCK EVEN THOUGH THEY SOLD ME A COMPLETELY DANGEROUS VEHICLE, WHICH I WILL EXPLAIN. MY TRUCK DIDN'T FEEL RIGHT AS I WAS DRIVING SO I DECIDED TO TAKE IT TO A SHOP TO GET LOOKED AT. THERE IS A LONG LIST OF THINGS THAT IS WRONG WITH THE VEHICLE, BUT I WILL MENTION JUST THE MAIN ONES. THE TRUCK WAS SOLD TO ME WITHOUT THE REAR BRAKES HOOKED UP. THE BRAKE LINES FOR THE REAR CALIPERS WERE CAPPED OFF BY THE REAR DIFFERENTIAL. WHEN THE MECHANIC SHOP DISCOVERED THAT, THEY ALSO DISCOVERED THE MASTER CYLINDER WAS COMPLETELY DRY, WHICH CAUSED DAMAGE TO MY FRONT BRAKES. THERE WAS NO CROSS MEMBER UNDERNEATH THE VEHICLE FROM FRAME TO FRAME. IT WAS TORCHED OUT, THEREFOR LEAVING ZERO SUPPORT FOR THE FRAME OF THE TRUCK AS WELL AS THE FRONT DIFFERENTIAL. WHICH NEEDED TO BE REBUILT CAUSED FROM EXCESSIVE MOVEMENT LEFT TO RIGHT. FRONT DIFFERENTIAL NEEDED TO BE REBUILT CAUSED FROM THE DAMAGE OF NO CROSS MEMBER IN PLACE. BALL JOINTS WERE ALSO AFFECTED (ABOUT TO POP OUT OF CONTROL ARMS) DUE TO WRONG PARTS INSTALLED IN FRONT SUSPENSION OF VEHICLE.
9/1/2015
WHILE DRIVING AT NORMAL HIGHWAY SPEED, TRUCK SHUT OFF EXCEPT FOR THE LIGHTS. LOST POWERS STEERING, BRAKES ETC. ONCE I GOT THE TRUCK PULLED OVER AND STOPPED, ATTEMPTED TO RESTART. WAS UNABLE TO DO SO UNTIL THE 4TH ATTEMPT DURING A 5 MINUTES TIME SPAN. ONCE STARTED, APPEARED TO BE RUNNING FINE EXCEPT FOR THE MIL ON THE DASHBOARD WHICH WAS LIT.
4/8/2016
ENGINE AND ENGINE COOLING
1 Report2% of totalPreviewing the first 1 complaint summaries.
TL* THE CONTACT OWNS A 2012 GMC SIERRA. THE CONTACT STATED THAT WHENEVER THE VEHICLE WAS IDLING THE CONTACT NOTICED THAT THE VEHICLE WOULD VIBRATE WITHOUT WARNING. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE CONTACT WAS INFORMED THAT THE FAILURE COULD NOT BE REPAIRED. THE CURRENT AND THE FAILURE MILEAGES WERE 1,200. ..UPDATED 04/16/12 *BF UPDATED 05/07/12
3/12/2012
SERVICE BRAKES, HYDRAULIC
1 Report2% of totalPreviewing the first 1 complaint summaries.
JUST PURCHASES NEW 2012 GMC SIERRA 3500 , 400 MILES , HAVE HAD ALIGNMENT / STEERING PROBLEMS WITH A DRIFT TO LEFT AND A WONDERING STEERING WHEEL, ALSO BRAKE AND ABS LIGHTS ON, WENT TO DEALER THEY LOOKED AT IT FOR 2 HRS, AND SAID IT NEEDED A PART ORDERED AND THERE WAS A TSB ON IT, THE TECH SAID IT WOULD BE SAFE TO DRIVE BUT I WOULD NOT HAVE ABS BRAKES, ALSO HE WOULD CHECK ALIGNMENT AGAIN AT TIME WHEN PART CAME IN 4 DAYS EST, BRAKE AND ABS LIGHT REMAINED ON, VEHICLE DROVE FINE THE NEXT DAY UNTIL A ACCIDENT, WENT AROUND CURVEAT 55 MPH, APPLIED BRAKES TO SLOW, BRAKES WENT TO FLOOR UN ABLE TO SLOW AT ALL WENT OFF THE ROAD LOST CONTROL AND CRASHED INTO TREES, BOTH AIRBAGS DEPLOYED , WENT TO EMERGENCY ROOM WITH ARM INJURY AND RIB INJURIES, BRAND NEW TRUCK VERY SCARRY I WILL NEVER BUY A GM PODUCT AGAIN. *TR
3/14/2012
VISIBILITY/WIPER
1 Report2% of totalPreviewing the first 1 complaint summaries.
PURCHASE A NEW 2012 GMC SIERRA SLE ON 07/26/12. AS I LEAVE FOR WORK IN THE EARLY HOURS, IT REQUIRES THAT I USE THE DEFOG/DEFROST. ON THE MORNING OF THE 28TH I SELECTED THE DEFOG/DEFROST AND ONLY THE DRIVER'S SIDE CLEARED. THINKING IT MAY BE ISOLATED, I RECEIVED THE SAME RESULT ON THE 29TH. I CALLED THE SELLING DEALER ABOUT ANOTHER MATTER AND MENTIONED THIS PROBLEM. ON AUGUST 9TH THE TRUCK WAS TAKEN FOR SERVICE AND TO ADDRESS THIS ISSUE. WAS TOLD THAT IT IS OPERATING AS NORMAL AND THE DEALER TESTED TWO OTHER NEW TRUCKS. STILL NOT HAPPY WITH THE ANSWER, I CALLED GMC. THEY SETUP SERVICE AT ANOTHER DEALERSHIP FOR THE 16TH. AGAIN, NO PROBLEMS COULD BE FOUND PER THEIR TESTING, BUT WERE GOING TO CHANGE THE DUCT AS THE AIR FLOW WAS MUCH GREATER TO THE DRIVER'S SIDE. WHEN THE DUCT CAME IN, THEY OPTED NOT TO CHANGE IT, AS IT REQUIRES TO STRIP THE DASH TO THE WINDSHIELD. ALL THIS TIME GMC WAS UPDATED OF THE PROGRESS. THE SYSTEM DOESN'T CLEAR THE PASSENGER SIDE OF THE WINDSHIELD AND PASSENGER DOOR WINDOW. GMC STAND IS, THAT ENGINEERING DESIGN THE SYSTEM THIS WAY TO CLEAR THE DRIVER'S SIDE QUICKER DURING POOR WEATHER, AS LIKE SNOW AND ICE. MY STAND IS THAT THIS IS NOT A PROPER ANSWER FOR A VEHICLE MAKER TO STATE. THIS ISSUE MAKES THE VEHICLE UNSAFE TO OPERATE AND I DO NOT LIVE WITHIN AN AREA SEEING THIS TYPE OF WEATHER OFTEN. I HAVE READ MANY INTERNET ARTICLES RELATED TO THIS. OTHER OWNERS TRUCKS OPERATE PROPERLY CLEARING BOTH SIDES OR HAVE HAD THEM PROPERLY REPAIRED IF THEY HAVE HAD THE SAME ISSUE. I NEED TO HAVE MY VEHICLE REPAIRED SO THAT IT CAN BE OPERATED SAFELY. GMC WILL NOT ADMIT THAT THIS IS A PROBLEM REQUIRING REPAIRS. *TR
8/23/2012
EXTERIOR LIGHTING
1 Report2% of totalPreviewing the first 1 complaint summaries.
VEHICLE WAS TAKEN TO GMC DEALER FOR HEADLIGHT DEFECT AND WE WERE INFORMED THAT THEY WOULD HAVE TO ORDER PARTS. DROVE TRUCK BACK TO SITE AND WHILE TRUCK WAS RUNNING BUT STATIONARY SMOKE WAS OBSERVED COMING FROM THE ENGINE COMPARTMENT. WHEN THE HOOD WAS RAISED THE ENTIRE TRUCK BECAME ENGULFED AND COMPLETELY BURNED. *TR
10/17/2012
STRUCTURE
1 Report2% of totalPreviewing the first 1 complaint summaries.
APPARENTLY GM USES PEANUT OIL TO LUBRICATE WIRING SO THEY CAN MORE EASILY INSULATE, ETC (ACCORGING TO THE GM DEALER). THIS ATTRACTS RATS AND MICE WHICH CHEW UP THE WIRING - POTENTIALLY IMPACTING SENSORS AND OTHER ITEMS CONTROLLING CRUISE, STABILITY/TRACTION CONTROL, AND ANY NUMBER OF ELECTRICAL SYSTEMS THAT THE DRIVER MAY BE RELYING UPON FOR SAFETY. I ACTUALLY HAD MAP SENSOR WIRES CHEWED UP THAT DISABLED MY STABILITY/TRACTION SYSTEMS AND INHIBITED ENGINE PERFORMANCE. LUCKILY FOR ME IT HAPPENED IN MY DRIVEWAY RATHER THAN ON THE HIGHWAY. DEALER CLAIMS IT IS NOT WARRANTY ITEM EVEN THOUGH CAUSED BY A PROCESS THAT GM ELECTS TO USE IN BUILDING THE VEHICLE. THIS COULD IMPACT ANY/EVERY VEHICLE THAT GM BUILDS WITH USE OF PEANUT OIL (MAY INDEED BE ALL OF THEIR MODELS). *TR
1/4/2013
WHEELS
1 Report2% of totalPreviewing the first 1 complaint summaries.
WHILE THE VEHICLE WAS BEING DRIVEN, IT JUST WENT DEAD, NO ENGINE, NO ELECTRIC, NO NOTHING. THE VEHICLE WAS LEFT IN PLACE AND AT SOME POINT, CAUGHT FIRE AND BURNED. A TOTAL LOSS. TO DATE, THE INSURANCE COMPANY HAS NOT PAID ME FOR MY LOSS BUT RATHER HAS GONE TO GREAT LENGTHS TO INVESTIGATE ME PERSONALLY, LOOKING FOR ANY REASON TO NOT PAY. SO, I'VE BEEN MAKING TWO VEHICLE PAYMENTS FOR THE LAST 8 MONTHS. AS A RESULT, I AM STRUGGLING FINANCIALLY. *TR
3/30/2014
LATCHES/LOCKS/LINKAGES:DOORS:LATCH
1 Report2% of totalPreviewing the first 1 complaint summaries.
PASSANGER FRONT DOOR HANDLE FAILURE. LOUD NOISE WAS HEARD UPON CLOSING OF THE DOOR. DOOR HANDLE PULL CLEAR FROM THE DOOR. WINDOW CANNOT BE ROLLED DOWN AND INTERNAL DOOR HANDLE IS INOPERABLE. *JS
5/19/2014
VISIBILITY:POWER WINDOW DEVICES AND CONTROLS
1 Report2% of totalPreviewing the first 1 complaint summaries.
PASSANGER FRONT DOOR HANDLE FAILURE. LOUD NOISE WAS HEARD UPON CLOSING OF THE DOOR. DOOR HANDLE PULL CLEAR FROM THE DOOR. WINDOW CANNOT BE ROLLED DOWN AND INTERNAL DOOR HANDLE IS INOPERABLE. *JS
5/19/2014
ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH
1 Report2% of totalPreviewing the first 1 complaint summaries.
TL* THE CONTACT OWNS A 2012 GMC SIERRA 1500. THE CONTACT STATED THAT THE DASHBOARD NEAR THE PASSENGER SIDE AIR BAG WAS FRACTURED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE DASHBOARD NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 22,000.
3/17/2016
Data and Methodology
Scores are derived from NHTSA recalls and owner complaints, normalized by vehicle segment averages.
What are the most common owner complaints for the 2012 GMC Sierra?
Are complaints about the 2012 GMC Sierra a serious warning sign?
How should buyers use complaint data for the 2012 GMC Sierra?
Are complaints about the 2012 GMC Sierra severe?
Complaint list entries are sourced from owner-submitted NHTSA ODI records.
GMC Sierra: How should complaint data influence buying decisions?
Carfocal links complaint data directly to recall and maintenance routes for the same model year.
- Complaint entries
- 46
- Top-topic view
- 5 grouped topics shown
- Primary source
- NHTSA ODI owner complaint records
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