Last post on Jul 28, 2011 at 8:56 PM
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Pontiac Grand Prix, Sedan
#4434 of 4457 2004 Pontiac Grand Prix, check gas cap light
Apr 02, 2010 (7:55 am)
I have a 2004 Pontiac Grand Prix, check gas cap light keeps coming on along with engine light, (not flashing) which in the Owner's manual says could be emissions.
I live in MN and as the weather warms up sometimes it goes off and when it's cold outside it comes back on.
I repalced with OEM gas cap from GM dealership and light still comes on, I went to Auto Zone and their code checker just comes up with large vacuum leak. Anyone have any ideas for me?
#4435 of 4457 Re: 2004 Pontiac Grand Prix, check gas cap light [pontiacs4evr]
Apr 06, 2010 (7:28 am)
If you check under the fender wall near the filler cap there is an canistar looking valve that is installed in the filler vent line. This is defective. Im in Canada and it is about $40 dollars at GM and is very simple to replace about 10 mins. I replaced 3 caps before being told this is a common problem.
This should solve your problem
#4436 of 4457 Re: 1998 - auto-temp not reading correctly [looking25]
May 30, 2010 (6:59 am)
I have the same problem with my 1997 and I can not even find where the sensor is located, can you please tell me where the sensor can be found/
picture would be great....
#4437 of 4457 Re: 1990 Pontiac Grand Prix Rough idle [headach]
Jun 16, 2010 (6:28 pm)
good man! hold on to these cars, I own a red '90 LE coupe 3.1 and I only paid $500 and it has NO RUST ANYWHERE. It'll be an antique in 5 years, and its a car thats got character and its fun to drive
#4438 of 4457 1995 Pontiac Grand Prix v6 help!!!
Jun 23, 2010 (12:36 pm)
I found a Pontiac Grand Prix on Craigslist that was on a dealership. I went and looked at it the guy said that the Intake Manifold Gasket needed to be replaced. Well the oil is white which leads me to believe that it is the Head Gasket that is bad. I need to know 100% what is wrong with the car before I buy it. I don't see how an Intake Manifold Gasket could cause moisture to get in the oil. Any advice helps.
#4439 of 4457 Re: 1995 Pontiac Grand Prix v6 help!!! [brokenmercy]
Jul 11, 2010 (10:08 am)
You have a blown head gasket which means there was another problem that caused that.Bad water pump or cooling fan inop maybe. It will probabaly use oil when your all done with repairs.Most cars do that have been overheated enough to blow the headgaskets.
#4440 of 4457 2004 GT Engine Knock Rough Idle after Head Gasket Job
Jul 23, 2010 (1:40 pm)
Had a complete gasket job (both heads, intake, exhaust, etc.) done, oil changed, antifreeze changed... Less than 1,000 miles later today, all of a sudden the engine is knocking like crazy (speeds up with acceleration), idle fluctuating between 6-900 at stop, cutting off/stalling at stoplights, etc.. I can`t get a hold of the mechanic who worked on it - it`s too late on a Friday afternoon - but I have to imagine it`s not a coincidence - even he remarked at the time that everything else looked great? Help!
Aug 11, 2010 (11:37 am)
Hi all! I just bought a red 2001 grand prix gt 1 owner car!! All maintenance records were on the car fax report it only has 59000 miles!!! I love this car probably the best car i have ever owned!!
#4442 of 4457 Re: 1995 Pontiac Grand Prix v6 help!!! [brokenmercy]
Aug 16, 2010 (7:22 am)
if that gp has the 3800 engine with the plastic intake, it is very possible that all that is needed is an intake and gasket... 3800 have a serious problem with the egr port burning a whole in the intake into the water jacket .. which puts antifreeze in the oil or exaust depending on when it blew ...
#4443 of 4457 2004 Pontiac Grand Prix "Service Variable Effort Steering" Light
Sep 09, 2010 (8:59 am)
Recently my "service variable effort steering" light came on. I took it to my mechanic and they said it was my rack & pinion. $1200 later, my light is still on and now my cruise control isn't working too. I took it to the dealer where I purchased it and at first, they told me the same thing, it was my rack & pinion. I explained everything that I had replaced 2 months ago and they rechecked it. They said its my EBCM module and that it's a $985 job. Anyone else experience this issue and do you have any suggestions?? Thank you!