2021 GMC Sierra 1500 service brakes problems
23 owner complaints filed with NHTSA name the service brakes on the 2021 GMC Sierra 1500 — 4% of all complaints for this model year.
What owners report
“XXX 2021 GMC Seria 108,339 miles driving home from [XXX] in town and out of nowhere the lights on the dash light up I saw it say adaptive steering and something breaking. There was a lot going on as the steering was rapidly shaking limited breaking while trying to avoid a collision. The engine…”
filed Sep 9, 2026
“Vehicle: 2021 GMC Sierra SLT | VIN: [XXX] Dealership: Carl Black GMC Roswell, GA (11225 Alpharetta Hwy, 30076) | Invoice #[XXX] | Service Date: [XXX] Paragraph 1 – Suspension Hazard: Dealership diagnosed a worn left upper ball joint (popping sound on left turns) and installed Rough Country…”
filed Jul 24, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Service Brakes problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 2 | 2% |
| 2025 Sierra 1500 | 6 | 5% |
| 2024 Sierra 1500 | 10 | 3% |
| 2023 Sierra 1500 | 14 | 3% |
| 2022 Sierra 1500 | 28 | 5% |
| 2020 Sierra 1500 | 49 | 11% |
| 2019 Sierra 1500 | 107 | 17% |
| 2018 Sierra 1500 | 40 | 13% |
| 2017 Sierra 1500 | 100 | 28% |
| 2016 Sierra 1500 | 100 | 29% |
| 2015 Sierra 1500 | 219 | 31% |
| 2014 Sierra 1500 | 139 | 19% |
Other reported problem areas on the 2021 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.