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  1. 02-09 General Tech Q&A
    2002 Trailblazer LTZ - My a/c works great, blowing hard and ice cold. But when I switch to heat, the air temperature is warm (not super hot), and the air speed blowing drops dramatically. Thinking this was an actuator issue, I replaced and calibrated all of them except recirculate. The problem...
  2. The 02-09 "How-To" and DIY Section
    Hey all! I have an 03 Trailblazer LS 4x4 that I got really cheap for a few issues. It had pretty much no options, and the standard base climate control system. A/C and heat both blow at their expected temperatures, and dual zone even still works. However, no matter what setting the fan is on...
  3. General
    First time poster. after replacing battery I started having several HVAC problems. 1) Temperature has either been ALL the way hot or ALL the way cold. 2) Mode door is not changing when I push the mode button. 3) Fan keeps blowing after engine is turned off and key is removed. Have to...
1-3 of 3 Results