[Instrument]

2000 Silverado. Blower motor only works on high. Been told that the "control module and harness is the likely culprit". Anyone replaced these itesm before? Any advice is appreciated. Its either too hot of too cold!

 

[Ed753]

You have manual HVAC, correct? If so, I'm betting its the Blower Motor Resistor: ACDelco # 15-81087 :yup:

This is by far the most common failed part in the blower circuit, unless the car has EATC, then all bets are off! Good Luck!

 

[jfnz24]

In another thread, I just had this problem in my Cavalier. It was the blower motor resistor there, and sounds like this is the problem you are having also. Good luck.

 

[Instrument]

So where is this resistor if this is the problem?

 

[Johnny P]

It's probably located right next to the blower motor. We're talking below the glove box. You can just chase the harness off the blower motor to the resistor.

 

[Triple-X08]

i would agree, the resistor is the problem, usually if it only has high speed.