IllustrationWHEN THE CONSUMER MADE A STOP, HE NOTICED THE TRAILER BRAKES DID NOT WORK. THE CONSUMER THEN RECEIVED A NOTICE IN THE MAIL REGARDING THE WIRING HARNESS IN WHICH GMC HAD SWITCHED TWO OF THE WIRES ON THE TRUCK AT THE FACTORY. THE CONSUMER PURCHASED A NEW BRAKE CONTROLLER BECAUSE IT BURNED UP . *AK *JB
2003 GMC Sierra 2500
Owner reports · Recalls · Investigations
More warning signs than most Sierra 2500 years
Owner complaints for the 2003 GMC Sierra 2500 are substantially higher than the model-year median of 46.
About this comparison →How this year compares
Owner complaints by model year
Compare all Sierra 2500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
140–25K
2825–50K
2950–75K
2075–100K
34100–150K
17150K+
142 reports with mileage · 18 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 43 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Electrical System. Review the 36 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 28 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
7 crash reports4 fire reports4 injury reports
Service Brakes, Electric complaints
1 reportsOfficial recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.