2003 GMC Sierra 2500 power train problems
13 owner complaints filed with NHTSA name the power train on the 2003 GMC Sierra 2500 — 8% of all complaints for this model year.
What owners report
“Tl* the contact owns a 2003 gmc sierra 2500. While driving at any speed, the vehicle stalled, lost power, and the service engine light illuminated. The vehicle was taken to an independent mechanic who was unable to diagnose the failure. The failure recurred. The manufacturer was made aware of the…”
filed Apr 26, 2016
“Brake line leaks, brake stopped working because of rusted brake lines. Also fuel and transmission lines are rusted badly. *tr”
filed Oct 26, 2014
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This…
24-NA-141 · Service Bulletin/Repair Instructions · issued Jul 24, 2024
Power Train problems in other Sierra 2500 years
| Year | Reports | Share |
|---|---|---|
| 2025 Sierra 2500 | 3 | 12% |
| 2024 Sierra 2500 | 23 | 24% |
| 2023 Sierra 2500 | 20 | 67% |
| 2022 Sierra 2500 | 5 | 12% |
| 2021 Sierra 2500 | 12 | 24% |
| 2020 Sierra 2500 | 22 | 30% |
| 2019 Sierra 2500 | 2 | 6% |
| 2018 Sierra 2500 | 3 | 9% |
| 2017 Sierra 2500 | 6 | 16% |
| 2016 Sierra 2500 | 1 | 2% |
| 2015 Sierra 2500 | 8 | 9% |
| 2014 Sierra 2500 | 3 | 10% |
Other reported problem areas on the 2003 GMC Sierra 2500
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.