Brake System Failures (Vacuum Pump)

Failures of the brake vacuum pump are a significant concern, often leading to a hard brake pedal and reduced braking effectiveness. This issue can also lead to catastrophic engine damage if debris enters the engine through the vacuum line. Estimated repair cost: $500 - $1,200.

Electrical System Malfunctions

Complaints include issues with the infotainment system, warning lights, and other electrical components. These can range from minor annoyances to more significant problems affecting vehicle operation. Estimated repair cost: $200 - $800.

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2019 GMC Terrain Maintenance guide

Name: Maintenance dataset for 2019 GMC Terrain
Creator: Carfocal

v1.0Updated May 30, 2026Ryan Davis4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2019 GMC Terrain, with a 'Below Average' reliability verdict, demands vigilant maintenance due to prevalent issues with its engine and service brakes. Owners should prioritize inspections of the brake vacuum pump and powertrain components, as failures have been reported at low mileage.

View Critical Issue: Powertrain Issues (Transmission, Engine Shutdown)

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

267 TSBs | 3 Recalls

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Key Takeaways

The 2019 GMC Terrain exhibits a 'Below Average' reliability rating, primarily due to significant issues with its engine, brakes, and powertrain.
Brake vacuum pump failures are a critical concern, potentially leading to reduced braking and engine damage.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance