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Some 99 Grand Prix vehicles will shift hard when it is warm. Not all of these vehicles will do this.
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∙ 9y ago
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Why does 97 olds achieva shifts hard after warm up and shifts fine cold what is the problem?
Perhaps transmission fluid is "breaking down" at high temp. Try changing fluid and filter
99 Grand Prix GT: you get hard shifting in your automatic transmission when it's warm Could it be the trans fluid temperature sensor?
,y car is doing the same runs fine cold once its warm shiofts hard i changed the catalic converter its a lil better whats else could it be if you know or found out please contact me daddyscoob@hotmail.com
Pontiac grand prix 1999 ac blows cold on passenger side and warm on drivers side.?
Temp blend door actuator malfunction.
What problems do crank sensors causes?
Problem with Crank sensor will cause 2001 Grand Prix not start when warm until it cool down? will this problem also cause vehicle to stall while driving?
What causes crank sensor problems?
Problem with Crank sensor will cause 2001 Grand Prix not start when warm until it cool down? will this problem also cause vehicle to stall while driving?
Why does Check Engine Light comes on after the engine is warm on a 1999 Pontiac Grand Prix?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Why would the AC on a '99 Grand Prix blow cold air on the passenger side and warm air on driver side?
Hey kenneth==It is the directional door not operating properly. It may be a problem with the controler. GoodluckJoe
I have a 1999 Pontiac Grand Prix that blows AC cool air out of the pasanger side and warm air out of the drivers side?
My mom had the same problem and we added freon and it blows very cold all over now.
Why would the engine on a 1999 Pontiac Grand Prix GT shut down on warm sunny days at high speeds?
Sounds like an electrical problem. Only way to determine is to take it to a reputable shop and have them dignosis the problem.
Is it best to slice hard cheese when it is cool or warm?
warm
Warm air on the pasenger side and cold air on driver side Pontiac grand prix?
Not sure what you're asking, but dif this is happening all the time, you might have a dual air control system. You can adjust the temp for the passenger and the driver, and the control may be faulty.
What would cause your 2004 Pontiac Grand Prix to start in the morning and evening but not start after sitting in the afternoon sun?
I have the same problem and I was told, by the dealer, that the fuel pump module isn't holding the correct pressure after a "warm soak" and needs to be replaced to the tune of $1,000.
