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Old 02-26-2011, 10:46 AM   #44
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Drives: 4 wheels
Join Date: Mar 2009
Location: Here
Posts: 1,404
I took mine in yesterday for the vibration and even though I had the service bulletin in hand they wouldn't cover it under warranty because I installed QTP cutouts. He said if the muffler wasn't welded straight to the coupling where it ties into the cats he would but if GM asked to look at the part that the whole thing would have to be looked at and the dumps were welded in.
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