2003 GMC Sierra 2500 Engine cooling Problems
- Complaints
- 5about this part
- Share
- 3%of 160 total for the year
- Median mileage
- 37,500miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine cooling of the 2003 GMC Sierra 2500, 3% of the 160 complaints for this model year. Where a mileage was given, the median is 37,500 miles. 1 of these say a crash was involved, according to the filers.
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.
“Power steering cooler and lines rusted through and leaking, engine oil cooler lines rusted through and leaking, transmission oil cooler lines rusted through and leaking. All had to be replaced. Work donea t Gmc dealer.”
NHTSA complaint #10448528, filed 2012-02, 69,671 miles“Instrument panel cluster components failed thus all gauges on dash board went flat /back to -0-; vehicle did operate however could not even read how much gas was in tank. Also as of mileage of 13312 notice vehicle began to use oil, as of 26300 after watching the vehicle noticed that it was extremely low; apparently the vehicle has been leaking oil on the intake - loosing almost 2 quarts of oil - on a newer vehicle it should not be using this much oil.”
NHTSA complaint #10054945, filed 2004-01, 5,330 miles“While driving on the highway, my 2003 Gmc SIERRA 2500 displayed a reduced engine power warning on my dashboard. My vehicle lost all speed control, decelerating from 65 MPH to 20 MPH in a matter of seconds. I immediately pulled over to the side of the highway and shut my truck off. Once I restarted the vehicle, the message was gone and my truck was fine. It was a very scary incident not being able keep the right speed for the conditions on the highway.”
NHTSA complaint #10439779, filed 2011-12Related service bulletins
- 10251887Mar 14, 2024This bulletin advises the technician of possible location of an internal coolant leak from a specific cylinder head and location.
- 10251890Mar 13, 2024This technical 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…
- 10250775Feb 22, 2024This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 10242843Sep 1, 2023The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the…
- 10242262Aug 24, 2023This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and…
- 10240344Jul 31, 2023This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.
- 10236164Apr 24, 2023This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10235802Apr 24, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
- 10234141Mar 23, 2023This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2022 | 1 | 2% |
| 2020 | 2 | 3% |
| 2019 | 2 | 6% |
| 2014 | 1 | 3% |
| 2013 | 1 | 2% |
| 2011 | 1 | 2% |
| 2009 | 1 | 3% |
| 2008 | 1 | 2% |
| 2007 | 2 | 2% |
| 2006 | 5 | 8% |
| 2005 | 13 | 11% |
| 2004 | 9 | 6% |
| 2003 | 5 | 3% |
| 2002 | 11 | 8% |
| 2001 | 21 | 16% |
| 2000 | 4 | 8% |
| 1998 | 1 | 7% |
Other parts of the 2003 GMC Sierra 2500
73 complaintsElectrical system
36 complaintsFuel system
15 complaintsTransmission and drivetrain
13 complaintsSteering
10 complaintsEngine
6 complaintsBody and structure
5 complaintsSuspension
5 complaintsVehicle speed control
4 complaintsTires
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsEquipment
2 complaints
← All problems reported for the 2003 GMC Sierra 2500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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