1999 GMC Yukon


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1999 GMC Yukon

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	Posted at Tue Nov 11, 2008 10:59 am
	By philpgc04, New to the forum
	Give Feedback \| Votes: 0


1999 GMC Yukon V8 Four Wheel Drive Automatic i had my catylac converters changed by a welding shop about a month ago because my truck was backfiring i also just got a tune up about 2 weeks ago now the mechanic is telln me that the welders put my or sensors in the exhuast pipe and they are suppose to be in the catylac converter and my engine isne givin off enough backpressure. where are my sensors suppose to be and is this the casu for the lack of backpressure.

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