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2002 2003 2004 2006 2007 4.2 4wd 4x4 a/c abs actuator air conditioning air suspension alternator amp arnott audio battery black bose brakes clean coolant custom differential door electrical engine envoy exhaust ext fan clutch fuel fuel pump fuse gas gmc gmc envoy grille headlight headlights hid hids hvac idle ignition ignition switch install interior introduction leak led lift lift kit lifted lights misfire mod mods no start noise oem offroad oil olds bravada oldsmobile bravada p0300 paint pcm power steering radio rear reduced engine power replace rims rough idle shocks speakers ss stalling starter stereo subwoofer suspension swap switch tbss tccm thermostat throttle body tires trailblazer transfer case transmission transmission problems vibration water pump wheels wiring xuv
  1. The 02-09 "How-To" and DIY Section
    Hello all, I was wondering what kind of fairly priced and relatively cheap tech upgrades I could add to my '03 envoy, using compatible hardware, i.e. something from a newer Envoy or trailblazer, or a cousin GMC vehicle. I'm less focused on horsepower or speed, though I wouldn't complain, and...
    engine performance engine upgrades envoy 2003 performance chip poor fuel economy
  2. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I am reaching out to the Trailvoy community as I am not sure what to do next. I have a 2002 Tblazer that has a consistently rough, low idle, it hesitates when accelerating from a stop and almost stalls. The worst part is, I am getting about 350km to a 60L tank of fuel... I used to get almost...
    low rpm power loss no error codes poor fuel economy rough idle acceleration stalling
  3. OEM Issues
    I tried Google and these forums but have been unable to find anyone with similar symptoms. Here's what I have: 2002 Trailblazer LTZ 4wd, 230,xxx miles SES light recently came on and produced codes P0171 and P0130. Poor fuel economy. NO driving issues at idle or while moving. While idling, I...
    2002 trailblazer p0130 p0171 poor fuel economy ses
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