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  1. Engine Tunes/Mods
    I have a 2004 Trailblazer 4.2L I6 and was wondering if anyone had a tuner or know where I can get the truck tuned. I have been having problems with my O2 sensor throwing a code. I have 110000 miles on the truck and recently put a new catalytic converter and o2 sensor in the truck. Everything was...
    4.2l oxygen rochester sensor tune
  2. General
    I'm trying to replace the front o2 sensor on the Envoy. The socket just slips and will not loosen it...any ideas how to get it off?
    envoy oxygen removal sensor
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