Questions & Answers for: GMC Yukon XL actuator heat

...and then back. When using ac the passenger side vents are blowing out heat. Help! check for any vacumm hose leaks that comes from the engine to the ac box, check for vacumm actuator proper

my four wheel drive fuse keeps blowing. 2002 GMC Yukon On the full size, the front actuator is electric, not vacuum. When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the

...OUT AND HAS NOT RETURNED INOVER 250 MI SHOULD I HAVE THE V4WD CHECKED? On the full size, the front actuator is electric, not vacuum. When in 4wd mode, a switch on top of the transfer case conducts

heat coming out of front vents until you turn the front fan on,then it blows warm air for about 10 seconds then goes cold again...maybe a celenoid for damper door? thanks for the help... Sounds like a

...heat and A/C controls. Find the vacuum can. It may be under the hood on one of the inner fenders. The "one-way" check valve is usually located in the line and close to the can, make sure it works ...

heat blows only cold air With engine warmed up, feel of heater hoses under hood to see if both are warm (careful don't burn yourself). If they both are warm, flapper door which directs airflow through