Thread: 2005 Grand Prix chugging

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  1. #1 Re: 2005 Grand Prix chugging 
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    I have the same problem. I have a 2005 grand prix and will randomly have sluggish acceleration. The problem is temporarily fixed when I shut off the engine and restart it. Does anyone have a solution?
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  2. #2 Re: 2005 Grand Prix chugging 
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    To Wolverines,

    Yes, I am still trying to figure my 05 Grand Prix out. I originally posted this problem late last year, without any fix. I don't have a clue as too why the car is doing this. It appears that its a 2005 model issue! It's pissing me off too.......
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  3. #3 Re: 2005 Grand Prix chugging 
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    Hey Wolverine.......

    Just saw you were having the same issue that I have been having with the 05 Grand Prix. I recieved a fix from another memeber that I wanted to pass along to ya:
    Old thread, but thought it worthy of an update.

    From surferstick:

    I had the stock PCM reflashed to the updated code mentioned in the TSB. It's now been months, and not a single problem since, so this fixed it for sure. Even better, the car now feels as strong as my old 99 did. I always felt I lost some power when I traded my 99 GT for this 05 GT, and now I've got my missing power back too.

    Happy New Year folks.


    I haven't gotten mine flashed yet, but will check into it.

    Just wanted to pass this along to ya.

    Later....... Steve!
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