2005 Envoy HVAC calibration procedure - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Old 02-15-2019, 07:20 PM
Linstanenvoy Linstanenvoy is offline
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Join Date: Feb 2019
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2005 Envoy HVAC calibration procedure

First ever question I have asked on this site.
Does anyone at Trailvoy know the proper calibration procedure for the automatic HVAC system on a 2005 GMC Envoy SLT six cylinder?
Vehicle is loaded with every option including programmable seats and rear heat controls.
Getting an annoying 20 second long clicking sound from in the dash actuator when vehicle ignition is on and currently the front vents are not delivering heat both in direct vent setting and floor and vent setting. All other vents settings are working well
Internet sites mention various re calibration procedures(removing fuse 36, reinserting it, turning key on or starting engine, etc to get all vent actuators aligned. I tried one procedure once with 36 HVACB and it worked, than made the mistake of trying a similar procedure with engine running and things went haywire.
Vehicle has under rear seat fuses 36 HVACB, 39 HVAC1, and 44HVAC
Dealerships advocates any suggestions from internet are bogus.

Please help, look forward to any suggestions that can help
Thanks
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