2020 GMC Sierra 1500 forward collision avoidance problems
14 owner complaints filed with NHTSA name the forward collision avoidance on the 2020 GMC Sierra 1500 — 3% of all complaints for this model year.
What owners report
“The brakes suddenly activate and cause the vehicle to rapidly stop with no warning of any kind and without any braking action being taken by the driver. Then, the brakes do not release and the vehicle cannot be moved as the brakes remain on. Turning the engine off and then restarting it or shifting…”
filed Feb 20, 2026
“My GMC had a terminal engine failure around 5/3/25. This disengaged the ESC, parking brake, and driver assist abilities as well as making the truck undrivable. GMC service diagnosed the truck needed an entire new engine. The repair took over 2 months to complete and now that I have the truck back…”
filed Jul 19, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Forward Collision Avoidance problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 6 | 9% |
| 2025 Sierra 1500 | 8 | 9% |
| 2024 Sierra 1500 | 13 | 4% |
| 2023 Sierra 1500 | 11 | 3% |
| 2022 Sierra 1500 | 19 | 4% |
| 2021 Sierra 1500 | 6 | 1% |
| 2019 Sierra 1500 | 8 | 1% |
| 2018 Sierra 1500 | 6 | 2% |
| 2017 Sierra 1500 | 6 | 2% |
| 2015 Sierra 1500 | 3 | 0% |
| 2014 Sierra 1500 | 3 | 0% |
| 2013 Sierra 1500 | 2 | 2% |
Other reported problem areas on the 2020 GMC Sierra 1500
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.