1999 GMC Sierra 3500 Engine cooling Problems
- Complaints
- 2about this part
- Share
- 11%of 19 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 Sierra 3500, 11% of the 19 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.
“Cab keeps filling up with exhaust fumes, causing passenger to get sick. Dealer claims engine gets too hot, causing engine manifold to warp and gasket to blowout. It is a design flaw.”
NHTSA complaint #862804, filed 2000-05“The check engine light came on and vehicle began to run roughly and stall, the vehicle was inspected and dealer found negative temperature signals, consumer has experienced problems on six occasions where the engine would stall and run rough, and has had various componets replaced, such as radiator coolant, coolant sensor, fuel pump, sending unit assembly, distributor, fuel injectors, spark plugs, wires, serpentine belt, throttle-positioning sensor, EGR and oxygen sensor, the bracket that protects the main wire harness was never installed from the factory and consumer feels this was the…”
NHTSA complaint #563678, filed 2001-10Related service bulletins
- 10246631Sep 1, 2013Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
- 10013205Apr 29, 2004Engine may have a condition in which the exhaust valve stem may become deformed. This includes 1999-01 chevrolet and gmc 4500 and 5500 models.
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 1 | 6% |
| 2024 | 1 | 2% |
| 2023 | 1 | 4% |
| 2020 | 1 | 2% |
| 2019 | 1 | 8% |
| 2016 | 1 | 5% |
| 2015 | 1 | 3% |
| 2009 | 1 | 20% |
| 2007 | 1 | 6% |
| 2006 | 1 | 9% |
| 2005 | 2 | 8% |
| 2002 | 1 | 5% |
| 2001 | 6 | 17% |
| 2000 | 3 | 12% |
| 1999 | 2 | 11% |
| 1997 | 1 | 10% |
Other parts of the 1999 GMC Sierra 3500
9 complaintsBody and structure
3 complaintsTires
3 complaintsSeats
2 complaintsAir bags
1 complaintsElectrical system
1 complaintsFuel system
1 complaints
← All problems reported for the 1999 GMC Sierra 3500
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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