My fan on my 2001 Chevy Blazer does not wirk when turn fan knob to 4. Makes squeaky noise when on 3. And nothing on knob number 1.

What is your question?

My 2001 Chevy Blazer. Does not push air out when turn know to 1 or 4. When turn know to 3 it works but makes a squeaky noise. What is problem. And cost to fix

What makes this problem better or worse?

Switching the fan knob

How long has your 2001 Chevrolet Blazer had this problem?

6months