Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
That would be. Try and see. Watch what happens.
#04-01-39-007: Loss of HVAC System Mode and/or Temperature Control (Replace HVAC Control Module) - (Jun 17, 2004)
Some customers may comment that they cannot control the HVAC system modes and/or the temperature. These concerns may be intermittent.
An HVAC control module logic lock-up may be the cause of these conditions.
Important: Prior to replacing the HVAC control head, review Corporate Bulletin Number 01-01-39-007 (SI Document ID #845221).
Replace the HVAC control module. Refer to the HVAC Control Module Replacement procedure in the HVAC System -- Automatic sub-section of the Service Manual.
Cadillac, Celsius Temperature Display (RPO U34)
HVAC Control Assembly (Module)
Cadillac, Minus (-) Celsius Temperature Display (RPO U34)
Chevrolet/GMC, Celsius Temperature Display (RPO U34)
Chevrolet/GMC, Minus (-) Celsius Temperature Display (RPO U34)
Off for 10 seconds will do fine and it will do it automatically when you turn the key on.
This issue is inside the sensor and you cannot clean it. In a sense, the calibration sweep does start to clean it.
Thanks. To get me directly the next time, in the title line put "For BlueGorilla Only" and I will get it as soon as I am able.