1999 Pontiac Trans Sport Engine cooling Problems
- Complaints
- 5about this part
- Share
- 50%of 10 total for the year
- Median mileage
- 44,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 5 complaints about the engine cooling of the 1999 Pontiac Trans Sport, 50% of the 10 complaints for this model year. Where a mileage was given, the median is 44,000 miles.
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.
“With respect to my 1999 Pontiac transport van, october of 2003 the engine started overheating and we discovered that the coolant was low. We added coolant and some type of seal into the coolant because we were told by several GM mechanics that it was probably the head gasket and this seal would help to get us by until we could have it fixed. I called the company where I purchased the van (2nd hand) and the van was no longer under warranty (over by 4,000 miles at the time). I did purchase the extended warranty. …”
NHTSA complaint #10061990, filed 2004-03, 44,000 miles“Transmission failure caused by antifreeze in transmission. Corrosion of radiator causing antifreeze to mix with transmission fluid. Now is overheating caused by intake manifold gasket leaking allowing antifreeze to get into crankcase. Potentially fatal for engine.”
NHTSA complaint #10014253, filed 2003-04, 44,402 miles“Intake manifold gaskets (upper & lower) need to be replaced because it is leaking engine coolant. Also need to replace thermostat and gasket. Cost $900.”
NHTSA complaint #10069942, filed 2004-01, 900 miles“The engine has been making a clicking sound or drumming sound for quite a while now. I have taken the van into the dealer on a number of occassions. I have since learned that my van is not the only van to make this noise, and that some vans have had the engine replaced because of it. Something about the pistons and wall chamber. The van has also quite running while I was driving w/children, and when braking, an awful loud noise comes, sounds like the car is falling apart. I refuse to take the vehicle back, and am having loads of problems dealing with this.”
NHTSA complaint #719406, filed 2000-02“Problems with the sliding door, headlamp fell off, automatic locks/window and etc. The consumer believed the vehicle has a coolant leak. The fuel modulator and spark plugs were replaced.”
NHTSA complaint #10065330, filed 2004-03Related 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 | 5 | 50% |
| 1998 | 52 | 23% |
| 1997 | 42 | 18% |
| 1996 | 13 | 21% |
| 1995 | 16 | 14% |
| 1994 | 11 | 11% |
| 1993 | 5 | 8% |
| 1992 | 2 | 3% |
| 1991 | 2 | 6% |
| 1990 | 7 | 16% |
Other parts of the 1999 Pontiac Trans Sport
2 complaintsBrakes
1 complaintsElectrical system
1 complaintsExterior lighting
1 complaintsFuel system
1 complaintsLatches, locks and linkages
1 complaintsOther or unknown
1 complaintsSeats
1 complaintsBody and structure
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints
← All problems reported for the 1999 Pontiac Trans Sport
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 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