The front ac/heat blower motor is not working. I replaced the blower motor relay and the blower motor resistor. it's my girlfriends car and she told me before that the back ac didn't blower either. now the back seems to be working since i changed the resistor.and at driving speed air flows out of the front, any ideas what i should try next?
Check Fuse #3 in the under hood fuse block it is the only common connection I can make.
SOURCE: 1999 yukon denali blower motor not working
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.
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Were is the front blower motor relay on a 03 GMC Yukon
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