I have a 2001 Chevy Tahoe 5.8 engine the blending door motor goes from cold to heat when the dial is set to heat.
I have replaced the air door actuator and the temp. control unit in the dash and I still have
the same problem. Is there any other thing I can check?
If this is happening under acceleration you have a bad vacuum check valve. HTH. -Jim
Search Chevrolet Tahoe Questions
Chevrolet Tahoe Experts