I have a 2004 GMC Yukon with auto climate control. The front a/c is working but the fan will not come on. The rear a/s works fine. Checked fuses, they are all good. Any suggestions?

I have a GMC 2003 yukon. Ac started blowing hot and they told me I needed to replace both rear and font evaporator valves ver $2000 w labor. took to other Mechanic and he checked or leak and could not find anywhere. Filled w dye and still no leak. Now ac, after refilled w freon week, before ran cold for a week but now blowing hot and cold again. any suggestions?

It's most likely your blower motor control module. Easy fix! Remove the kick plate under the glove compartment and the module is right next to your blower motor - remove the two screws and it will drop right out. Disconnect the wire harness (2 wires) and replace. Good luck!