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  1. 02-09 General Tech Q&A
    I just replaced my ecu on my 4.2 and replaced it with a unit from an 04. The speed shows 7 to 8 mph slower than gps. Can I reflash the ecu? I also noticed that when I hook up my scan tool it lists the 04 trailblazer vin. My TB is an 03 LTZ With 130,000. Do I need to go to the scrap yard and...
  2. 2013+ Chevrolet Trailblazer Forum
    hi guys! i recently jumped a friends tahoe with my 03 trailblazer. Right after that my radio and a/c would go out out of nowhere along with power locks not working and the back wiper would just turn on by itself. but it only happens after having the blazer on for a couple min. What I want to...
  3. General
    Hi I've got an 03 trailblazer with around 180k. I've begun noticing that i lose alot of speed when going up hills. I live in an area where i go over one on my way to work and no matter how much speed i build up (around 60-65) I'm down to 30-35 half way up the hill. Its not even a very large...
  4. Introductions
    So I just bought a 2003 Trailblazer LT 4X4 with the 4.2L, I am here for info on lifting it, and I want to see what all you guys have done to yours.
  5. General
    Ok I'm sure this is going to make me sound stupid, but on my 03 trailblazer theres a small on off switch to the left of the steering wheel near the hood release lever, theres also a little black button above it. I have no idea what it does :crazy: is it for when a trailers attatched? Because...
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