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Re: 2001 Tahoe rear o2 heater monitor failure - WWYD
Posted to Technical Discussion Forum on 6/28/2005 1 Reply

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Let the truck cool for at least 30 minutes. Put the 4 sensors on the Tech2 screen and set to millivolts. Turn the key on...what do they read? Wait 2 minutes and watch the readouts. What do the frt sen... Login to read more.

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