Print report
January 2: GM Says Brake Master Cylinder Failure Lawsuit Fails news | 9 days ago
December 28: GM Lifter Failure Lawsuit Includes Multiple Models news | 14 days ago
December 22: GM Air Conditioning Class Action Lawsuit: 8 Years in Court news | 20 days ago
December 7: GM Engine Class Action Lawsuit Set To Begin news | 35 days ago
December 7: GM 8-Speed Transmission Lawsuit Runs Into Trouble news | 35 days ago
2020 GMC Terrain
Problems & Complaints
Worst 2020 GMC Terrain Problems by Category
Click on a category below for details. Help?
- AC / heater problems
- electrical problems
- engine problems
- brakes problems
- miscellaneous problems
- drivetrain problems
- fuel system problems
- seat belts / air bags problems
- exterior accessories problems
- body / paint problems
- suspension problems
- wheels / hubs problems
- steering problems
- lights problems
- windows / windshield problems
- transmission problems
Loading ...
one sec.
Stay Up to Date
Compare GMC Terrain Model Years
Curious how the 2020 Terrain compares to other years?
Check out our GMC Terrain overview to see the most problematic years, worst problems and most recently reported complaints with the Terrain.
Worst 2020 GMC Terrain Problems
-
#1: Drivers Door Does Not Lock If Key Fob Is Inside Vehicle 2020 Terrain
- Average Cost to Fix:
- N/A
- Average Mileage:
- 8,000 mi
-
#2: A/C Condenser Leak 2020 Terrain
- Average Cost to Fix:
- $2,000
- Average Mileage:
- 55,000 mi





