2020 GMC Terrain Service Brakes Problems

NHTSA component category: SERVICE BRAKES · data through 07/12/2026

58Service Brakes complaints

32%Of all 181 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How service brakes ranks on this vehicle

SERVICE BRAKES58 · 32%

ENGINE54 · 29.8%

Unspecified / other31 · 17.1%

ELECTRICAL SYSTEM25 · 13.8%

POWER TRAIN24 · 13.3%

Share of the 181 complaints citing each category; one complaint can cite several. Full breakdown on the 2020 GMC Terrain overview page.

What owners report

“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…”NHTSA complaint 11628017 — filed 11/30/2024

“While driving reduce engine power light came on and the brakes gave out. I weigh 250 lbs and took all my strength to get brakes…”NHTSA complaint 11611870 — filed 08/30/2024

“While driving I had to push the brake to the floor and a light came on saying reduced engine power. I pulled over right away…”NHTSA complaint 11610272 — filed 08/22/2024

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Service Brakes complaints by year filed

Frequently asked questions

Does the 2020 GMC Terrain have service brakes problems?

Service Brakes is the most-reported problem area on the 2020 GMC Terrain: 58 of 181 complaints on file (32%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2020 GMC Terrain have in total?

181 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 7 involved a crash, 1 involved a fire, 5 reported injuries, and none reported deaths.

What does NHTSA's service brakes category include?

NHTSA assigns each complaint to standard component categories; this page reports the SERVICE BRAKES category exactly as NHTSA defines and records it.

About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.