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rear hvac

  1. Thanks for the info on the 2003 Ext rear hvac system.

    Introductions
    Just purchased a few weeks back a 2003 Trailblazer Ext 4wd with 142,000 miles for my soon to be 16 year old son to drive. He loves it and now may have to fight mommy for it. She has been driving it to see if any issues pop up. The only issue we knew up front was that the rear hvac system did not...
  2. Long Wheel Base Rear HVAC LEDs Installed

    Interior
    Items used: 5mm blue 1600mcd, 90 degree viewing angle, straw hat LEDs 470 ohm 1/4W resistors I didn't find a write up on this particular setup, so figured I'd put one out there in case anyone with a long wheel base truck needs a reference. The rear unit pops out without much effort or...
  3. How to fix the clicking in the rear of an EXT

    OEM Issues
    Just wanted to put this out there for all of you! I experienced an issue where every time I started the TB Ext there was clicking for the first 5 minutes. It sounded like it was coming from the back right. I came to find out that it was coming from the HVAC unit that is located under the...
  4. Rear A/C temp

    General
    I have an 04 Envoy XL. I have a problem with the rear a/c. When I control the rear a/c from the front, things work fine. I get cool air in the back. I switch the front switch to "R" and the rear control is set to cool, the air temp then warms up. Switch back to control from the front and...
  5. Rear Hvac slow heat

    OEM Issues
    I've been looking around for quite a while and cannot find the issue that i have. the issue is that my rear heat takes forever to get warm. example it's 30 degrees outside and after 5 minutes of driving i can turn on the front heat and it's blowing warm air. so i'll turn on the rear heat and...
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