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Gary
Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 932
Experience:  GCM master tech over 25 years
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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: 2 years ago.
Category: GMC
Expert:  George H. replied 2 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 2 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 2 years ago.

This is an automatic temperature control system?

 

 

Customer: replied 2 years ago.
Correct.
Expert:  George H. replied 2 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

 

Thanks

 

 

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