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Re: 2002 Yukon XL, Intermittent Misfire
Posted to Technical Discussion Forum on 3/29/2007

Hi David,

Did you see this snapshot?

[2002 GMC Yukon XL C2500, ECM/Inputs/Outputs Scandata] Both HO2S's went low and fuel trims ramped up very quickly. The O2S's went to below 100 mV and stayed there for around 2 seconds and then it went back to normal. Login to read more.

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