1999 GMC C1500 Suburban Engine cooling Problems
- Complaints
- 2about this part
- Share
- 17%of 12 total for the year
- Median mileage
- 112,500miles
- 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 C1500 Suburban, 17% of the 12 complaints for this model year. Where a mileage was given, the median is 112,500 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.
“The contact owns a 1999 Gmc C1500 SUBURBAN. While driving at approximately 65 MPH, the oil field exploded. The vehicle was taken to an independent mechanic where it was diagnosed that the field fractured and caused oil to seep into the engine. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 126,000.”
NHTSA complaint #10713399, filed 2015-04, 126,000 miles“The contact owns a 1999 Gmc suburban. The contact stated that the brakes were wearing prematurely. The vehicle was towed to the dealer, who stated that the brake lines, hardware, brake cylinder and calipers needed to be repaired. The manufacturer was made aware of the failure. The vehicle was repaired. The failure mileage was 99,000 and the current mileage was 137,960. Also, the A/C was repaired several times, as it was blowing out hot air, the rear passenger door was inoperative, the starter was replaced, the radiator was leaking. Updated 07/30/14”
NHTSA complaint #10604547, filed 2014-06, 99,000 milesRelated service bulletins
- 10246631Sep 1, 2013Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 1999 | 2 | 17% |
Other parts of the 1999 GMC C1500 Suburban
5 complaintsBrakes
3 complaintsAir bags
1 complaintsEquipment
1 complaintsFuel system
1 complaintsLatches, locks and linkages
1 complaintsOther or unknown
1 complaintsSteering
1 complaintsBody and structure
1 complaintsSuspension
1 complaints
← All problems reported for the 1999 GMC C1500 Suburban
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