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Re: Slow 02 response 2013 Silverado 5.3 4X4
Posted to Technical Discussion Forum on 1/22/2020 2 Replies

I have put tons of HO2S in these Karl and I never ever do a heater relearn. Not saying I am right for not doing it, just don't. And it also isn't un-common for one on each bank to go bad. Just takes one guy not putting them back in the retainers when doing som... Login to read more.

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