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spark plug gapping for 2002 yukon xl
ok so my delima is that my 2002 yukon xl 1500 5.3 origanally had a spark plug gapping of 0.060 but some where down the road gmc decide to change that i think it is indicative to the specifcation of the engines feul econimy why would they put a gapping of 0.040 in place of it? to me i think this...- PDidHe
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- Forum: General Discussion
