I have a 99 Suburban with dual heat and air, the problem I'm having is the front heat and air , front heat is cooler and air is warmer than the rear. I thought is was the actuator, but when I removed it I manually moved the blend door and realized that the sweep of the actuator was not going as...
The rear works fine, it's the actuator in the front that's not not turning all the way. When I removed the actuator, I was able to get good heat up front.
I have a 99 K1500 Suburban with front and rear heat/air, the front heat is cooler than the rear.
I have replaced the actuator and no change, while the actuator was off I rotated the piece the actuator controls and the heat was great, but when the actuator is installed it's cooler than the rear