I have 99 GP GT 3800 NA. The motor has 86xxx miles and was meticulously maintained. One day the cat went out and was taken to the dealer. The car came back with a very noticeable knock. The dealer actually “rebuilt “ the lower end for some reason after bringing this to their attention. All I paid was time(6 months)and parts which spoke volumes about what had transpired while there as something clearly went wrong. I received the car back and now I’m dealing with another knock only on the top end. Took it to GM and of course all they said was “the top end has to be rebuilt but we can replace the motor”, absolutely no help identifying the issue at hand.
I can’t find a reliable tech and need some real professional help which is why I’m here and hav taken a video I of the noise and motor but can’t figure out how to upload it to this thread so pm me and I can email it.
Any help is GREATLY APPRECIATED. Tia guys.
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