2003 Pontiac Montana Engine Problems
- Complaints
- 2about this part
- Share
- 2%of 84 total for the year
- Median mileage
- 111,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 2003 Pontiac Montana, 2% of the 84 complaints for this model year. Where a mileage was given, the median is 111,000 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.
“After heading home from taking my son to the er, my temp gauge started to rise fast to the red lines while I was going down the street. I quickly pulled over, put it in park and shut my engine off. I got out out of the car and looked under neath. Coolant was pouring all over the ground under the engine. Obviously couldn't drive so I had to call the husband to pick us up and a tow truck. Took the van to two different garages and they both said the head gasket blew. I have found that GM knows about this problem and many have complained but yet not one recall on this issue. …”
NHTSA complaint #10669519, filed 2015-01, 125,000 miles“Van over heated after replacing water pump and thermostat. Dexcool was required by GM for warranty car was flushed out and dexcool was replaced. One week later van over heated again, was told it was an air bubble in heating system. Bleed out system using a vacuum pump and pulled out all the air in the system. This worked for about 3 months. Problem returned again in spring in 3/6/2012 over heated again drivingbat highway speeds 25 miles from starting point. Found air in system again. Had water pump, thermostat, hoses and coolant all replaced again. Problem is still occurring. …”
NHTSA complaint #10462225, filed 2012-06, 97,000 milesRelated service bulletins
- 10242298Aug 10, 2023This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10211658May 2, 2022This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
- 10178387Jul 27, 2020This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller…
- 10176326May 21, 2020This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308…
- 10176607May 8, 2020This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank…
- 10167437Oct 14, 2019This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the…
- 10160987May 7, 2019This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the…
- 10160983May 6, 2019This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller…
- 10144451Aug 8, 2018This Preliminary Information communication provides information to the technician about engine block of possible cylinder bore damage, scoring or out of round as the possible…
- 10129097Jan 25, 2018This Preliminary Information communication provides information to the technician about finding needle bearings during an oil change. Technician will gain access to the roller…
Engine: other model years
Other parts of the 2003 Pontiac Montana
16 complaintsElectrical system
15 complaintsExterior lighting
14 complaintsAir bags
12 complaintsEngine cooling
10 complaintsBody and structure
6 complaintsLatches, locks and linkages
5 complaintsSteering
4 complaintsSuspension
4 complaintsTransmission and drivetrain
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBrakes
3 complaints
← All problems reported for the 2003 Pontiac Montana
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