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https://en.wikipedia.org/wiki/Chevrolet_TrailBlazer WikipediaProduction of the Blazer overlapped with the TrailBlazer until 2005, when the 2-door ...2006-2008 Chevrolet TrailBlazer LT ... The Active Fuel Management system on the V8 engine shuts off 4 of the 8 ... 2003-2005 Chevrolet TrailBlazer EXT.
Mar 6, 2012 - Uploaded by MAY03LT
These are the first tests that I do when I have a Trailblazer that won't start. ... Car will not start trouble shooting guide, wontcrank, wont turn over, etc. ... Chevy Trailblazer - testing fuel pressure 2002 -2004 4.2 I6 - Duration: 4:34.
Hi. There happens to be a common problem with these trailblazers inside the ducting box located under the dashboard. The mode actuator door motor stops working due to a faulty motor itself and the default position is defrost only. As far as the Air Conditioning not working, there maybe another problem to diagnose there. Could be low refrigerant, or electrical problems to the compressor, or faulty fan clutch(another very common problem with these trucks). Type in mode actuator door and 2005 trailblazer in your search engine online i.e. Google or Yahoo and you will find many posts about this problem. I think there may even be a Youtube video about replacing it. Let me know you need more help. Thanks.
my TB did the same thing and I took off the ThrottleBody and took a rag with a can of Throttle/Carb cleaner and clean the ThrottleBody real good.....You will need some type of brush like a toothbrush to scrub of some of the old buildup of carbon.....my TB runs fine now....
May be the heater/AC control unit in the dash.The heat stays on the floor because the door actuater moter is not switching direction of air flow and as far as the warm air,if you engine is up to operating temp,then the heater control valve is not opening fully.Both are conected to the heater/AC control unit.
Had the same problem on my 2005 trailblazer I replaced the resister and wire harness because wire harness was burnt on a few connections. Cost was 75 bucks for both parts at Napa auto parts works fine now