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Re: 2002 GMC Yukon, Poll Did It, Or Didn't It Need It
Posted to Technical Discussion Forum on 6/29/2007 3 Replies

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I wouldn't say your getting beat up at all.

In order for the cats to work correctly you need to have proper fuel control. So maybe the original ones weren't as bad as you think. That is all. Maybe t... Login to read more.

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