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Re: Slow 02 response 2013 Silverado 5.3 4X4
Posted to Technical Discussion Forum on 1/22/2020

I can't honestly answer that Karl. I haven't really looked at something this old in awhile to be honest. However when I would get heater codes I can say without hesitation that 99.9% of the time is was a bad HO2S. And I don't ever remember doing the relearn. I... Login to read more.