IllustrationDIESEL FUEL LEAKS FROM INJECTORS INTO ENGINE OIL PAN AND CONTAMINATES ENGINE OIL THEM LEAKS OIL FROM BREATHER & REAR MAIN OIL SEAL AND GM KNOWS THERE IS A PROBLEM BUT WONT DO ANY THING FOR THIS PROBLEM SAID ITS OUT WARRANTY ON TIME NOT MILES. *TR
2004 GMC Sierra 2500
Owner reports · Recalls · Investigations
More warning signs than most Sierra 2500 years
Owner complaints for the 2004 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
80–25K
3225–50K
3750–75K
1775–100K
20100–150K
8150K+
122 reports with mileage · 21 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.
- Electrical System. Review the 48 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes, Hydraulic. Review the 22 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
4 crash reports4 fire reports3 injury reports
Fuel System, Diesel complaints
5 reportsFAILURE OF INJECTOR CONNECTOR CIRCUIT ON CYLINDER #7 FAILURE CODE PO207 - TSB #05-06-04-047C. *TR
ALLISON TRANSMISSION HOUSING FAILED AT 54,000 MILES. GM PAID PARTS, I PAID 1,200.00 LABOR , WAS TOLD THAT THERE WAS 2 BULLETINS OUT ON DEFECTIVE HOUSING AND WHEN THEY FINISHED REPAIR THEY SAID THEY INSTALLED UPDATED HOUSING SO I WOULD NOT HAVE PROBLEM AGAIN. DON'T THINK I SHOULD HAVE PAID ANYTHING TO HAVE IT REPAIRED! AT 105,00…
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ALLISON TRANSMISSION HOUSING FAILED AT 54,000 MILES. GM PAID PARTS, I PAID 1,200.00 LABOR , WAS TOLD THAT THERE WAS 2 BULLETINS OUT ON DEFECTIVE HOUSING AND WHEN THEY FINISHED REPAIR THEY SAID THEY INSTALLED UPDATED HOUSING SO I WOULD NOT HAVE PROBLEM AGAIN. DON'T THINK I SHOULD HAVE PAID ANYTHING TO HAVE IT REPAIRED! AT 105,000 MILES TRANSFER CASE FAILED , COST 1,150.00 TO REPAIR, HAVE HAD TO TAKE BACK 2 MORE TIMES AS REPAIR WAS NOT DONE RIGHT. AT 112.000 MILES SPEEDOMETER BECAME ERRATIC WAS TOLD IT WAS A COMMON PROBLEM ,AND SEE ON COMPLAINT SEARCH IT IS , CONSIDER THIS A GREAT SAFETY DANGER AS I DO NOT KNOW WHAT SPEED I'M GOING CAN ONLY GUESS NOT FIXED YET FOUND SOME WHO SELLS REBUILT ONES FOE 150.00 ,SAID THEIR REBUILDING THEM DUE THE LARGE NUMBER THAT ARE FAILING. ALSO AT 112,000 MILES PARK NEUTRAL SWITCH STARTED ACTING UP ,CHECK ENGINE LIGHT ON ,SHIFT BAR LIGHT GOES AWAY, TRUCK WON'T SHIFT PROPERLY AND STAY IN CERTAIN GEARS WITHOUT SHIFTING UP ,EFFECTS DOOR LOCKS. LOOKED UP PARK NEUTRAL SHIFT AS PART AND CAME ACROSS BULLETINS STATING THAT DURING LEFT HAND TURN FRONT TIRE SPRAYS WATER ONTO PARK NEUTRAL ,SWITCH CAUSING PROBLEM ,NEEDS FRONT & REAR SHIELD INSTALLED TO SOLVE PROBLEM. HAVE TAKEN TRUCK BACK IN WAITING FOR INFORMATION. ALSO AROUND 90,000 MILES HAD VERY HARD TIME STARTING TRUCK AND TRUCK RAN POORLY,PROBLEM BECAME WORSE TOOK IN, FUEL INJECTORS WERE BAD AND WERE REPLACED UNDER WARRANTY AT 112,000 MILES NO NEED TO SAY I'M NOT A GMC FAN ANYMORE , EVEN THOUGH I LIVE IN LANSING MI ( A GM TOWN)AND HAVE LOTS OF FRIENDS AND FAMILY EMPLOYED THERE. GOOD BY GMC! NEVER AGAIN. *TR
FUEL LEAK. FUEL PUMP LEAKING CAUSE FUEL TO BE SPEW OUT OVER ENGINE AND UNDER CARRIAGE. *TR
DIESEL POWER KEEPS REDUCING. TRUCK HAS BEEN TO DEALER TWICE. ALL MAINTENANCE IS PERFORMED PER OWNERS MANUAL, INCLUDING FUEL FILTERS. TRUCK HAS BEEN TO DEALER TWICE FOR THIS PROBLEM. I SUSPECT INJECTOR FAILURE OR OTHER FUEL SYSTEM PROBLEM. AT 5000 MILES THE PREVIOUS OWNER HAD A NEW INJECTOR PUMP REPLACED. I FEEL THAT THIS MAKES T…
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DIESEL POWER KEEPS REDUCING. TRUCK HAS BEEN TO DEALER TWICE. ALL MAINTENANCE IS PERFORMED PER OWNERS MANUAL, INCLUDING FUEL FILTERS. TRUCK HAS BEEN TO DEALER TWICE FOR THIS PROBLEM. I SUSPECT INJECTOR FAILURE OR OTHER FUEL SYSTEM PROBLEM. AT 5000 MILES THE PREVIOUS OWNER HAD A NEW INJECTOR PUMP REPLACED. I FEEL THAT THIS MAKES THE VEHICLE UNSAFE TO TRAILER WITH. I HAVE TROUBLE MAINTAINING SPEEDS ON EVEN THE SMALLEST OF GRADES NOT TOWING MUCH WEIGHT. I HAVE CONTACTED GM, WHICH WAS LESS THAN HELPFUL. DEALER INSISTS THAT IT NEEDS THE "THROTTLE BODY CLEANED", NO THROTTLE BODY ON A DIESEL! TRUCK IS NOW GOING TO A RECOMMENDED, COMPETENT MEDIUM DUTY DEALERSHIP. *JB
Official recalls
104V562000 · Equipment Adaptive/mobility
Nov 26, 2004
ON CERTAIN VANS EQUIPPED WITH SURE-LOK WHEELCHAIR SECUREMENT SYSTEMS, THE SPROCKET TEETH OF THE RETRACTOR ASSEMBLY IS OUT OF ALIGNMENT.
Consequence & remedy
Consequence: IN THE EVENT OF A VEHICLE CRASH, THE WHEELCHAIR MAY NOT BE ADEQUATELY SECURED POSSIBLY RESULTING IN INJURIES TO A WHEELCHAIR OCCUPANT.
Remedy: DEALERS WILL INSPECT AND REPLACE THE WHEELCHAIR SECUREMENT RETRACTORS AS NECESSARY. SURE-LOK WILL HANDLE THE REPAIRS FOR THIS CAMPAIGN. OWNERS SHOULD CONTACT SURE-LOCK AT 1-908-231-1804 OR MOBILITYWORKS AT 1-800-769-8267.
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.