2003 Chevrolet Silverado 2500 engine problems
15 owner complaints filed with NHTSA name the engine on the 2003 Chevrolet Silverado 2500 — 3% of all complaints for this model year.
What owners report
“The exhaust manifold bolts are breaking on the 6.0 engine. I think gm should do this repair since I have talked to several people and this is very common. It is a design defect as far as I am concerned. I have put up with this as it started as a small leak but is getting worse.”
filed Dec 13, 2017
“5 out of 8 exhaust manifold bolts are broken on the passenger side of vehicle and 2 on drivers side. I have 120k miles on vehicle.”
filed Mar 21, 2017
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
03-06-01-023I · Service Bulletin/Repair Instructions · issued Dec 18, 2024This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
03-06-01-023H · Service Bulletin/Repair Instructions · issued Oct 7, 2024This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how…
16-NA-383 · Service Bulletin/Repair Instructions · issued Jun 28, 2024
Engine problems in other Silverado 2500 years
| Year | Reports | Share |
|---|---|---|
| 2025 Silverado 2500 | 5 | 23% |
| 2024 Silverado 2500 | 13 | 9% |
| 2023 Silverado 2500 | 7 | 16% |
| 2022 Silverado 2500 | 5 | 6% |
| 2021 Silverado 2500 | 7 | 8% |
| 2020 Silverado 2500 | 10 | 10% |
| 2019 Silverado 2500 | 19 | 26% |
| 2018 Silverado 2500 | 12 | 23% |
| 2017 Silverado 2500 | 12 | 22% |
| 2016 Silverado 2500 | 8 | 7% |
| 2015 Silverado 2500 | 12 | 7% |
| 2014 Silverado 2500 | 7 | 18% |
Other reported problem areas on the 2003 Chevrolet Silverado 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.