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.

Asked by Jun 14, 2014 at 10:15 PM about the 2001 Chevrolet Tahoe LT 4WD

Question type: Maintenance & Repair

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?

1 Answer

59,175

If this is happening under acceleration you have a bad vacuum check valve. HTH. -Jim

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