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 Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1693
Experience:  GM Grand Master Technician 2007. 14 year experience.
Type Your GMC Question Here...
Gm Tech (Cam) is online now
A new question is answered every 9 seconds

GMC Yukon SLT: 2003 GMC Yukon blower wont work on high but

Customer Question

2003 GMC Yukon blower won't work on high but still is pumping out just a little cold air. High/Low setting not making any difference in air flow volume.
Submitted: 5 years ago.
Category: GMC
Expert:  George H. replied 5 years ago.

Hello I will help you with your question,


Does the blower motor run at all?


Can you switch the vent positions from floor to dash vents?



Customer: replied 5 years ago.
The blower is blowing a light amount of cold air. It was on high when driving then went out. Could tell immediately. Switching vent positions doesn't change anything nor does moving air volume control.
Expert:  George H. replied 5 years ago.

This is an automatic temperature control system?



Customer: replied 5 years ago.
Expert:  George H. replied 5 years ago.

OK, try a reset by removing the HVAC/ECAS fuse from the underhood fuse block. Wait 30 seconds and re install. Turn the key to the run position and wait 1 minute, turn the key off and start the engine.


Let me know if the controls come back to life