Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.

NHTSA — Engine And Engine Cooling Problems


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
62,076 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 Pontiac Montana engine problems

engine problem

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2003 Pontiac Montana Owner Comments

problem #4

Jun 012008


  • 73,000 miles


The valve pulled out of rocker arm mid 2008 on #2 cal costing approx $600 repair again in 2009 the #3 cyl valve pulled out effecting another repair. Then a week later the #5 cyl has quit firing. This is the 3400 or 3.4 liter engine. My mechanic explained this was a common problem with this motor in the Grand Am or Grand Prix.

- Rainbow City, AL, USA

problem #3

Apr 032009


  • 86,600 miles
Was told intake manifold gasket failed. Over a thousand dollar fix with religious oil changes and coolant flushes, should not have happened. I have talked with many Montana owners of different years and all have had the same problem. This cannot be a surprise! there is something wrong here... even two different repair shops said this is a "common" issue of the Pontiac Montana. I was told they were surprised it didn't happen sooner and there were signs it was in the making for awhile. Please look into this! its not a cheap fix!

- Clarkston, MI, USA

problem #2

Nov 102008


  • 88,702 miles
2003 Pontiac Montana 3.4L series "E" engine. 10/15/2007 85,342 miles. Rocker arm bolts (8mm) striped out of the 1,3,5 cylinder head. Head needs to be replaced. Repaired at dealer $1,500. Dealer service center also checked 2,4,6 cylinder head and rocker arm bolts, all ok. 11/10/2007 88,702 miles. Rocker arm bolts (8mm) striped out of the 2,4,6 cylinder head. Again on same vehicle head needs to be replaced. Another $1,500 this site aready shows loose or stripped bolts on other 2003 Montanas. I wonder what a cross reference of GM 3.4L engines show up with this same problem.

- Clinton Twp, MI, USA

problem #1

May 012007

Montana 6-cyl

  • Automatic transmission
  • miles
Intake manifold leaking at 60,000 miles. Dealer will not do anything about it. Have heard this from many sources and there is a class action lawsuit being proposed. Updated 01-15-08. Updated

- Eastlake, OH, USA

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