1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

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Feb 25, 2019 | 9:24 AM

#11

Irish_alley

I'm here for the party

Joined: Feb 2019

Posts: 1,467

Likes: 83

From: Maryland

so between the first O2 and the cat? was it there before you replaced the cat?
regardless do the steps as Tech wrote out

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