1991 GMC Sonoma Engine cooling Problems
- Complaints
- 4about this part
- Share
- 14%of 29 total for the year
- Median mileage
- 99,743miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the engine cooling of the 1991 GMC Sonoma, 14% of the 29 complaints for this model year. Where a mileage was given, the median is 99,743 miles. 1 a fire, 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.
“Problem with exhaust pipe on muffler. The consumer was referred to a muffler shop to have a patch put on the front header pipe and was not given any option to have it fixed correctly”
NHTSA complaint #10044094, filed 2003-10, 95,486 miles“Consumer had to replace the rear brake shoes and tail pipe. The consumer took the vehicle to the dealer for exhaust repair. The dealer suggested that eh consumer take the vehicle to the muffler shop for a header pipe patch. The consumer is interested in knowing if a header pipe patch is illegal with the present vehicle emissions standard.”
NHTSA complaint #10026731, filed 2003-07Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2003 | 1 | 3% |
| 2002 | 4 | 7% |
| 2001 | 7 | 8% |
| 2000 | 6 | 4% |
| 1999 | 4 | 7% |
| 1998 | 11 | 7% |
| 1997 | 8 | 7% |
| 1996 | 19 | 13% |
| 1995 | 26 | 12% |
| 1994 | 12 | 5% |
| 1993 | 7 | 12% |
| 1992 | 2 | 8% |
| 1991 | 4 | 14% |
Other parts of the 1991 GMC Sonoma
14 complaintsElectrical system
3 complaintsSteering
2 complaintsBody and structure
2 complaintsTransmission and drivetrain
2 complaintsEquipment
1 complaintsExterior lighting
1 complaintsLatches, locks and linkages
1 complaintsSeat belts
1 complaintsSuspension
1 complaintsTires
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 1991 GMC Sonoma
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