HVAC Passenger Temp Actuator Replacement - Page 5 - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

General If it doesn't fit in any other forum

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Old 05-23-2019, 05:24 PM
pjp144 pjp144 is offline
Junior Member
2008 GMC Envoy SLT
Black 4.2L I6 4X4
Join Date: Feb 2019
Location: RI
Posts: 14
Hvac blend door

My a/c works fine except the two driver side vents blow hot air , what can be done and are all blend doors the same ?
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Old 05-24-2019, 12:06 AM
michaelb95030 michaelb95030 is offline
Junior Member
2003 Chevy TrailBlazer LTZ
Indigo Blue Metallic 4.2L I6 4X4
Join Date: Jun 2016
Location: palo alto, ca
Posts: 5
drivers side temp actuator

Originally Posted by GMCNEBR View Post
Our 2003 Envoy had some kind of a power break (clock reset) and when we turned on the AC, it was hot on the drivers side and cold on the passenger side. The battery went bad a few days later. In the process of checking for issues and changing the battery, the AC compressor quit coming on also. Took the car to the dealer and the dash control was replaced. With what I had read in the forum, I decided to attempt to replace the temp door actuator myself. It was easier than I expected. As I took the dash apart, I moved the AC controls and watched the back side of the actuator(s) shaft and could verify which door was not moving. I bought the actuator at the GMC dealer and saved about 60$ on the part. I needed the "secret" of opening the actuator, removing the top gear, so I could spin the "connector" to match the vent door post for the install (trial and error). Thanks for the help folks.
What was the part number ?
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