How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask JFN1 Your Own Question
JFN1, ASE Certified Technician
Category: GMC
Satisfied Customers: 4758
Experience:  GM Master Technician
Type Your GMC Question Here...
JFN1 is online now
A new question is answered every 9 seconds

On a 4th of july trip my ac ducts on my 99 suburban switched

Customer Question

on a 4th of july trip my ac ducts on my 99 suburban switched from the dash to the floor registers and will not go back up to the dash ..when it switched to the floor, it was cold initionaly but soon it turned hot air only coming outon the floor, & i had to open the windows ......i would like to know what is the fix for this?
Submitted: 2 years ago via
Category: GMC
Expert:  JFN1 replied 2 years ago.
This sounds like you have a failure of the HVAC control head, if all of these things occurred at once. If nothing is responding as it should, I would check my fuses first, then source a replacement control head.