I have a 04 Colorado Z71 2WD. The A/C fan blows on high only. It was intermittent at first but know permanent. When the fan speed is set to 1,2 or 3 with the A/C button depressed the compressor kicks on but fan won't blow. Works fine when fan is set to high (4). Suspect a relay or something. Any suggestions?

I have the same problem if you figure it out let mer know.

i have a 04 with 60k miles and this just started.what the hell do i do!!

mine is under war. so it is going in soon i will let you know what they find.

Hey Guys help is here! If your vehicle is out of warranty, replace your blower resistor. 2004 thru 2008 colorado uses part#15218254 if you have access to A/C Delco dealer use 15-80521. Cost $14.00. It is located at the bottom of your A/C blower motor.

connector also,usually burnt

They just replaced the resistor on my 2004 Colorado yesterday. 4th time in 2 years.

My symptoms were different - the fan was spinning, but no air was coming out of the vents.