Thread: knocking sound

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  1. #1 knocking sound 
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    On a cold start ,when i put my 2003 gp in reverse, there is a single knock sound. Only does it the one time until i leave the car sit for hours... then it will do it again. Any ideas what is causing this. I checked the fluids and it has only started this last week. Thank you
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  2. #2 Re: knocking sound 
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    Quote Originally Posted by kenneth74gt View Post
    On a cold start ,when i put my 2003 gp in reverse, there is a single knock sound. Only does it the one time until i leave the car sit for hours... then it will do it again. Any ideas what is causing this. I checked the fluids and it has only started this last week. Thank you
    Only doing this in reverse?
    2000 Buick LeSabre Custom - 3800 Series II V6
    1998 Buick LeSabre Custom - 3800 Series II V6 ​SOLD!
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