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Re: 2002 Yukon XL, Intermittent Misfire
Posted to Technical Discussion Forum on 3/28/2007 12 Replies

Everyones request to see the misfire data and fuel trims/HO2S's were the first things I had looked at.

Here's the misfire data [2002 GMC Yukon XL C2500, ECM/Inputs/Outputs Scandata]

Idle Fuel Trims [2002 GMC Yukon XL C2500, ECM/Inputs/Outputs Scandata]

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