SOURCE: 2005 GMC Yukon air conditioning
this just happen to me 2005 denali; dead battery in the morning, replaced it...and I have cold on drivers & screaming hot on passenger...is there a fix posted....& I just dont see it?? what gives?
SOURCE: 1999 gmc safari van upper vent
Check under the hood for deteriorated small vacuum hose coming off the intake over to the heater box area.
Repair the vacuum hose.
SOURCE: How do you replace the headlight bulbs in a 2009
under the hood at the back of the head lights you can twist and unplug the bulb or they will do it at the part store for you most the time
SOURCE: 2006 slt gmc envoy ac problems vent controls anbd
{: ) The popping sound you heard is caused by the sudden movement of an HVAC door, most probably coming from the recirculation door actuator (right dashboard area) or the mode actuator( mid dashboard area). The fan outputs could be normally working, but is being muffled by the incorrect positioning of the HVAC doors, giving an impression that there is fault in the blower controls. In other words, your vehicle is having an air distribution issue.
If there's no conflict in your climate settings, then the trouble may be in the HVAC doors binding or broken, or the actuators faulty or sticking. In both cases, servicing may involve removal of the dashboard to access these HVAC components.
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