2014 GMC Sierra 1500 power train problems
68 owner complaints filed with NHTSA name the power train on the 2014 GMC Sierra 1500 — 9% of all complaints for this model year.
What owners report
“I am experiencing ongoing issues with the 6L80E transmission that have significantly affected the performance and reliability of my vehicle. The transmission shifts harshly between gears, hesitates when accelerating, and occasionally slips before engaging. There is also a noticeable shudder during…”
filed Aug 3, 2026
“The contact owns a 2014 GMC Sierra 1500. The contact stated that while driving downhill, the vehicle failed to accelerate as intended while depressing the accelerator pedal. In addition, the vehicle felt as if it were in neutral. The tachometer gauge revved up independently. No warning lights were…”
filed May 7, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Sierra 1500 years
| Year | Reports | Share |
|---|---|---|
| 2026 Sierra 1500 | 17 | 25% |
| 2025 Sierra 1500 | 20 | 22% |
| 2024 Sierra 1500 | 64 | 20% |
| 2023 Sierra 1500 | 81 | 19% |
| 2022 Sierra 1500 | 100 | 18% |
| 2021 Sierra 1500 | 129 | 24% |
| 2020 Sierra 1500 | 88 | 20% |
| 2019 Sierra 1500 | 129 | 21% |
| 2018 Sierra 1500 | 125 | 43% |
| 2017 Sierra 1500 | 116 | 33% |
| 2016 Sierra 1500 | 83 | 25% |
| 2015 Sierra 1500 | 95 | 13% |
Other reported problem areas on the 2014 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.