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trailblazer 03

  1. 4wd

    Off-Road
    So I recently got a 2003 trailblazer. I’m not to familiar with the truck but I was testing the 4hi on dry pavement no faster than 5 mph but there’s a lot of resistance and it feels like something is binding. I chalked it up the the dry pavement but I recently went to the snow and even on the...
  2. General
    I have a question. What exactly can homelink do. I have heard about the garage door opener, but not too sure what the other portion is for. The part with what looks like stop, play, and record buttons.
  3. Classifieds
    I have the following parts for sale: Original Passenger and Driver Power Heated Side View Mirrors that were removed to install upgraded units and have been in storage, excellent condition, OEM slightly used, Part #15178913, 15789783 - $50 ea./$90 for both GENUINE GM LEFT HAND MIRROR AMBER TURN...
  4. General
    I have an 03 trailblazer LT swb 3.73s with 188k on the clock with the 4.2 vortec, at highway speeds of 75 mph and sometimes 80mph I can achieve 19-21mpg (hand calculated), was wondering what you guys were getting out of your TBs, mine is pretty much fully loaded. The mileage was made on a trip...
  5. 4x4 Drivetrain
    michigan finally got its first big snow of the year so i try to use 4WD, i can bear it clicking and engaging outside the car but there’s no power being sent to the front wheels, there’s no service 4x4 light and the switch will switch to all the 4WD options without a problem, anyone know what...
  6. OEM Issues
    I have milky oil on the fill cap and top othe dip stick but the oil in the pan is fine. I canged the oil a week before this happened and it was almost dry and I have no oil leaking on my drive way... It has 215000 on it and I'm not sure where to start or if it's worth trying to fix.
  7. General
    I have a Trailblazer 2003 LTZ 80000miles This does not work: Volt meter, rear wiper, rear windows, power door locks, interior lights, instrument cluster lights, shows security and unknown driver, no high beam. Some of the steering wheel controls does not work. All fuses ok. car starts. Cleaned...
  8. General
    I am trying to determine if a problem a friend is having is the PCM/ECM. His 2003 Trailblazer dumped its tranny and so he grabbed one off of a GMC Envoy(as he tells it). He had driven the Envoy to be sure the tranny was good, no problems. After his 'tech' swapped the transmissions, and...
  9. Introductions
    Hello, I just wanted to introduce myself. This site has a lot of great information on it! I enjoy reading through the threads and learning a lot about my vehicle. I've just recently purchased a trailblazer for the first time and love it. It's a 2003 LT 4x4 model. Any helpful information that...
  10. Exhaust Mods
    I've read all the threads I can find on here about changing the cat on my 03 trailblazer. I don't know the technical name for a lot of these parts, but here's what I am running into. There is a fork like stabilizer on the cat near where it connects with the muffler. It is a silver triangular...
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