2003 GMC GMC Truck Engine cooling Problems
- Complaints
- 3about this part
- Share
- 17%of 18 total for the year
- Median mileage
- 40,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 3 complaints about the engine cooling of the 2003 GMC GMC Truck, 17% of the 18 complaints for this model year. Where a mileage was given, the median is 40,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I noticed since I bought my 2003 Gmc envoy that the motor would race in the am upon starting. I took this as normal until the racing never stopped one day. I took it to my local GM dealer and they informed me the fan clutch had failed and repaired it for over 700$. Upon research later on this part I noticed people saying these are failing at a regular basis. Now, I'm not a mechanic, but I think had I not the knowledge I do of automobiles, I would have continued to drive and possibly could have had a major engine failure of some sorts. …”
NHTSA complaint #10140186, filed 2005-10, 40,000 miles“Brake lines, transmission lines and engine coolant lines all failing on 2003 Gmc 2500 hd sierra as well as on 2004 chevy silverado hd 3500. These problems have caused numerous amounts of time to repair and replace, and today there was a catastrophic brake failure on the 2003 hd Gmc which almost resulted in a deadly accident. These lines should not have rusted they way they are especially on two (2) different vehicles from the same manufacturer. These vehicles were produced with inadequate parts for all lines on the underside of vehicle. …”
NHTSA complaint #10377916, filed 2011-01, 70,000 miles“Missing and they seem not able to fix it some times it shifts hard other times it backfires it has been in the shop twice all they can say is the computer shows nothing and that how the engine runs and that is unacpectable to me for a new truck.”
NHTSA complaint #10041693, filed 2003-10, 300 milesEngine cooling: other model years
Other parts of the 2003 GMC GMC Truck
6 complaintsElectrical system
3 complaintsBrakes
2 complaintsTires
2 complaintsEquipment
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsSteering
1 complaintsBody and structure
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2003 GMC GMC Truck
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology