1999 GMC GMC Truck Engine cooling Problems
- Complaints
- 2about this part
- Share
- 15%of 13 total for the year
- Median mileage
- —not reported
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine cooling of the 1999 GMC GMC Truck, 15% of the 13 complaints for this model year.
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.
“Three problems - incident date not exact for all problems.1) had vehicle accelerate in nearly wide-open throttle position while braking at a stoplight in heavy traffic. Avoided accident by shifting truck into reverse and forward several times before I finally was able to turn off engine. Had truck towed to dealership where the throttle body was replaced. Since that time I have had throttle stick closed. I contacted dealership and was told carbon deposit was causing problem and they would clean for $100.00. …”
NHTSA complaint #10091219, filed 2004-09Engine cooling: other model years
Other parts of the 1999 GMC GMC Truck
8 complaintsExterior lighting
1 complaintsBody and structure
1 complaintsTires
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaintsWheels
1 complaints
← All problems reported for the 1999 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