Intake Manifold Leak


pretty bad
Typical Repair Cost:
Average Mileage:
74,092 miles
Total Complaints:
3 complaints

Most Common Solutions:

  1. not sure (1 reports)
  2. probably another engine replacement (1 reports)
  3. replaced engine, hoses,radiator, intake manifold gasket (1 reports)
2003 Pontiac Grand Prix engine problems

engine problem

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2003 Pontiac Grand Prix Owner Comments

problem #3

Mar 182011

Grand Prix SE 3.1L V6

  • Automatic transmission
  • 88,000 miles


Well what do you know, I'm probably looking at another engine replacement because the dexcool ate away the intake manifold gasket AGAIN. Had engine replaced because of this issue in April 2008 with 54000 miles.. Engine, radiator, gaskets,hoses all replaced. I was told that GM has made a better intake manifold gasket, what they didn't tell me is that it won't last much longer than the other. Obviously dexcool & plastic don't mix.I am now @ 88000 miles (34000)since the engine was replaced. I am having deja vu. Thermostat is bouncing up and down like crazy. Just waiting on the word how much it is going to cost this time. I AM SO DONE W/GM. NEVER, NEVER, NEVER AGAIN WILL I BUY A GM VEHICLE!!!!!!!

- , East Bridgewater, MA, canada

problem #2

Apr 102008

Grand Prix SE 3.1L V6

  • Automatic transmission
  • 54,000 miles

Had bought the car w/only 11,000 miles on it. Kept up on routine maintenance at dealer. At 54,000 miles the thermostat started bouncing up and down. Called dealer right away, they figured thermostat was stuck. Brought it in and they told me my engine was junk! oil in the coolant and coolant in the engine. Intake manifold let go because of the dexcool that eats away at the plastic on the gasket. Had to replace engine, radiator, hoses, gaskets. Just under $3000, good ol GM picked up half the tab. Personally, at 54,000 with PROOF OF ALL MAINTENANCE DONE SINCE DAY ONE THEY SHOULD HAVE PAID FOR THE WHOLE DAMN THING! Oh did I mention I had just been laid off from my job 2 weeks before. Was told that the intake manifold gasket was now "made better"hmmm, 38,000 miles into the new engine I am having deja vu. On to my next complaint!

- , East Bridgewater, MA, canada

problem #1

Mar 192009

Grand Prix GT

  • Automatic transmission
  • 80,275 miles

Bought this car brand new in 2003. Took it back to the dealer 3 times after smelling anti-freeze through the vents. All three times I was told it was no issue. I never thought about it again until I moved from Ohio to North Carolina and I failed a State inspection. The service station advised me of the problem and told me that this had become a common complaint with this car and it should be reported for a possible refund from GM for the repair costs.

- , Wilmington, NC, USA

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