2018 GMC Sierra 1500 suspension problems
10 owner complaints filed with NHTSA name the suspension on the 2018 GMC Sierra 1500 — 3% of all complaints for this model year.
What owners report
“The transmission has always been rough. It has now gone out at 75,000 miles. This transmission issue really seemed to get worse about 50,000 miles. But when I called the dealer, they said they were backed up and couldn't get to it for 9-12 weeks (Covid excuses at that point). Then, it really had an…”
filed May 15, 2026
“1. Electronic power steering modular issue. My 2018 GMC SEIRRA 1500 CREW CAB JUST LOST ALL POWER STEERING. THEN WHEN I PARK IT. Assist notifications come on, ABS notices, BRAKE light stays on, trailer/tow notifications, trailer assist, parking brake, etc SUDDENLY A LOUD thump & feels like the whole…”
filed Mar 3, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Suspension problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 1 | 1% |
| 2025 Sierra 1500 | 1 | 1% |
| 2024 Sierra 1500 | 3 | 1% |
| 2023 Sierra 1500 | 2 | 0% |
| 2022 Sierra 1500 | 2 | 0% |
| 2021 Sierra 1500 | 8 | 2% |
| 2020 Sierra 1500 | 18 | 4% |
| 2019 Sierra 1500 | 9 | 1% |
| 2017 Sierra 1500 | 8 | 2% |
| 2016 Sierra 1500 | 15 | 4% |
| 2015 Sierra 1500 | 17 | 2% |
| 2014 Sierra 1500 | 24 | 3% |
Other reported problem areas on the 2018 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.