2003 GMC Envoy engine problems
10 owner complaints filed with NHTSA name the engine on the 2003 GMC Envoy — 3% of all complaints for this model year.
What owners report
“The contact owns a 2003 GMC Envoy. The contact stated that while in drive(D), the vehicle shut off and then restarted. The message “Service Engine Soon” was displayed. The vehicle was taken to the local dealer, where it was diagnosed and determined that the instrument cluster needed to be replaced…”
filed Mar 12, 2026
“Gradual coolant loss over time and no evidence of leak. This was due to a crack in the cylinder head that gm admitted to knowing about in tsb 06-06-01-019b on june 12, 2007). Coolant was slowly leaking into the oil, but was unnoticeable until it started to affect oil pressure from the oil becoming…”
filed Jul 24, 2018
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This 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 Envoy years
| Year | Reports | Share |
|---|---|---|
| 2008 Envoy | 4 | 5% |
| 2007 Envoy | 8 | 4% |
| 2006 Envoy | 20 | 6% |
| 2005 Envoy | 14 | 3% |
| 2004 Envoy | 16 | 4% |
| 2002 Envoy | 16 | 3% |
Other reported problem areas on the 2003 GMC Envoy
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.