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Pete
Pete, GMC Mechanic
Category: GMC
Satisfied Customers: 29094
Experience:  GM training and dealer tech for 14+ years. Diagnostics
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2003 Yukon rear air is cold front air is not

Customer Question

2003 Yukon rear air is cold front air is not
Submitted: 2 years ago.
Category: GMC
Expert:  Pete replied 2 years ago.
My name is ***** ***** I am a professional here at Just Answer. I noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.
From what you have described here this sounds like an electrical fault with the temp actuator for the hot/cold door on the heater box.If this electronic actuator fails it will cause this here.This will cause rear air to operate correctly but not the front.
Thanks Pete