Last post on Aug 12, 2012 at 6:16 PM
You are in the Chevrolet TrailBlazer
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Chevrolet TrailBlazer, Chevrolet TrailBlazer EXT, Heating / Cooling, SUV
#23 of 52 Mode selector inoperative
Feb 02, 2010 (4:39 am)
I have a 2007 Trailblazer LT and the mode selector seems to be stuck on the vent position.
When I select defrost or heat at the feet, a portion of the flow does come put on the selected mode however it never stops coming out of the vent mode.
Can someone tell me what needs to be replaced?
#24 of 52 A whole lot of Problems!!! Help Please!
Apr 13, 2010 (1:29 pm)
I have an '04 Trailblazer that I bought used with 19,000 miles on it. Over the past year, I started having problems out of it and am slightly disgusted with it. I love my trailblazer but am afraid that Chevy may have produced a few lemons with these vehicles. I had to replace the alternator about a year ago. Less than 2 months later, it had to be replaced again. Then the battery died and had to be replaced. When the battery died, it began a whole new set of problems. My passenger and rear vents will only blow out heat no matter where I set the temperature to on the climate control. If my fuel level gets low enough for the fuel light to come on, within a minute or so the fuel hand will start going back up like I'm pumping gas in to it. The check engine light is constantly coming on and off. If I turn the fan on high, I get a vibration noise. I took it to a dealership when the AC stopped working correctly. I also told them about the other problems I was having. They said that my HVAC control head, blower motor, and passenger side actuator were all bad and needed to be replaced. They charged me $100 to tell me what was wrong and then wanted $2000 to fix it. They still didn't tell me what was causing the rest of the problems. My car isn't worth much more than the AC repair cost at this point. Anyone having any of these problems? Can some of this be fixed on my own? I have a friend who is a mechanic and he said that this wasn't very complicated. He even gave me a printed diagram of where everything is located as far as the AC parts go, but I still have no idea about the other problems. Any suggestions? PLEASE help!!!!
May 21, 2010 (12:43 pm)
On my '03 TrailBlazer, the front air quit blowing while the rear air worked fine. The problem tuned out to be a resistor under the front passengers side dash. It cost about $80.00 for the part and .5 hours labor. Basically the problem was caused by a faulty ground within the resistor and if you manually grounded it the AC worked fine. Hope this helps someone!
#26 of 52 03 Trailblazer LT Stalls when AC is on
Jun 03, 2010 (12:57 pm)
My Trailblazer runs fine until I turn on the AC or Heater... is there something that I can adjust to fix it?
#29 of 52 air condition 2005 trail blazer
Jun 11, 2010 (3:14 pm)
My Air Condition keeps going out i have to take it to the shop and they have to reboot it in the computer what is the cause of this all wiring checks out
#30 of 52 Re: air condition 2005 trail blazer [jes59]
Jun 14, 2010 (12:41 pm)
I apologize that you have a concern with your vehicle. Can you please email me with more information about your situation so I can look into this further? You can get my email by clicking on my name. Thank you,
Mariah GM Customer Service
#31 of 52 Re: air condition 2005 trail blazer [gmcustsvc]
Jun 15, 2010 (9:29 am)
I have a 2003 Trailblazer and I am having a similar problem. I recently replaced my battery and now the A/C is only blowing at my feet and side vents regardless of the control settings. I see on some postings it is a bad resistor or a faulty ground. Is this something that I can check.
#32 of 52 Re: air condition 2005 trail blazer [lealaj]
Jun 15, 2010 (12:32 pm)
You can check it yourself or have a service technician look at it for you. Unfortunately I cannot tell you how to fix your vehicle if you are planning on doing it yourself. If you have any further questions please let me know. Thank you,
Mariah GM Customer Service