Question about 1999 GMC Yukon Denali

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1999 yukon denali blower motor not working

The front and rear air is not working. I replaced the blower motor relay and the blower motor resistor. I hooked a lantern battery directly to the motor terminals and it runs. any idead what my problem could be. my girlfriend wants her ac really bad and wants to take it to a professional. I would like to fix it myself.

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Check the dash fan control switch. It can be purchased separate from the whole cluster for under twenty dollars. The instrument panel cover comes off gently by hand with the tilt steering in the down position. You have to then unplug the electrical plugs to get it out of the way. The heater ac control panel then comes out by hand far enough to unscrew the heater fan control from the back. Auto Zone may have this part and have the step by step instruction to get the job done if needed. Good luck and hope this helps, if the fuse and relay is good, then it's going to be the switch. Keep me posted, be glad to help. 

Posted on Jun 27, 2009

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1 Answer

My 2003 Yukon Denali no longer blows air from the front Front air vents


Do you know how to do automotive electrical testing ? Videos on youtube showing how to do it . Does your Yukon have manual or automatic Heater/AC system ? Could be the blower motor is bad , blower motor control module (if automatic ) Do you hear the blower motor running ? 2005 Chevrolet Tahoe Blower Not Working Chevy GMC same thing

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I have a 2008 Yukon Denali. There is no power getting to the blower motor. I have tested the fuses and relays, replaced the blower resistor, and straight powered the fan/blower motor with 12V power and the...


Need wiring diagrams in order to learn what is in the
circuit & how it works & were to do your testing

I think most people know that, but have no experience
working with wiring diagrams

I won't go near a vehicle or check anything at all, without
studying a wiring diagram first

You did the component testing part, but you usually do the
power or voltage drop testing & grounds to components first

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05 YUKON REAR HEAT NOT WORKING


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