Lt Headers, Off Road Y Pipe, And O2 Sensors!
01-22-2006, 12:20 PM
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Lt Headers, Off Road Y Pipe, And O2 Sensors! I just installed a set of LT Headers in my 2005 GMC Sierra 5.3L. Now my SES Light came on. I know is because of my CATLESS Y Pipe and rear o2 sensors. This week I'm going to San Antonio to have Allen Dyno-tuned my truck, and I'm planning to turn off all the o2 related stuff. Is this a ggod idea? will it affect my gas mileage?
