Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
1-1 of 1 Results
  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...
1-1 of 1 Results