NHTSA Complaint #11628017 — 2020 GMC TERRAIN

SERVICE BRAKES issue reported to NHTSA

Check any vehicle history by VIN - Free vehicle history report

Complaint Details

ODI Number	11628017
Vehicle	2020 GMC TERRAIN
Component	SERVICE BRAKES
Date of Incident	November 30, 2024
Date Filed	November 30, 2024
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	TX

Consumer Description

My Terrain has a light that has been coming on for a couple months. Service Brake Assist. I took it to the dealer after my brakes locked up and about $800 after getting it fixed the light continues to come on. The forward collision light comes on every time I start the car. More the check engine light came on and says engine electrical system. What the heck is going on? I love this car and take very good care of it but I feel like the $800 that I just spent was a waste. I fear that I will get in a wreck like when the brakes totally locked up and I couldn't press on them.

Related Complaints for the 2020 GMC TERRAIN

Other SERVICE BRAKES Complaints

#11709184 — January 6, 2026 — While driving down the interstate a notice popped up on my dash about the brake assist. When I attempted to slow dow...

#11705372 — December 16, 2025 — Since August 2024, my brake booster has gone a total of five times each time with the notification on the dash servic...

#11702750 — December 3, 2025 — While driving my brakes failed. I was unable to stop my car, my brake pedal became very stiff and I could not stop my...

#11702097 — November 30, 2025 — While driving on a main road at around 45mph the vacuum pump that supplies brake fluid to the brakes failed. The car ...

#11699191 — November 13, 2025 — Vacuum pump went out. It was a recall, previously on older models, but this model needs to

Recent Complaints for the 2020 GMC TERRAIN

#11716636 — ELECTRICAL SYSTEM — February 9, 2026 — The contact owns a 2020 GMC Terrain. The contact stated that while driving in cold weather at various speeds; moistur...

#11714544 — UNKNOWN OR OTHER — January 30, 2026 — I own a 2020 GMC Terrain with approximately 110,000 miles. While driving in winter, the vehicle suddenly lost cabin h...

#11713540 — ENGINE — January 27, 2026 — I noticed a sticker in driver door stating recall however no evidence. The vehicle will not pull hills, back up on a ...

#11713540 — FUEL/PROPULSION SYSTEM — January 27, 2026 — I noticed a sticker in driver door stating recall however no evidence. The vehicle will not pull hills, back up on a ...

#11713540 — STRUCTURE:BODY — January 27, 2026 — I noticed a sticker in driver door stating recall however no evidence. The vehicle will not pull hills, back up on a ...