PIC4019F: HVAC Operation During Remote Start – 2006-2012 Chevrolet Impala & 2006-2007 Chevrolet Monte Carlo

#PIC4019F: HVAC Operation During Remote Start – (Mar 28, 2016)

Subject: HVAC Operation During Remote Start
Models: 2006 – 2012 Chevrolet Impala
2006 – 2007 Chevrolet Monte Carlo

This PI was superseded to update model and model years. Please discard PIC4019E.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.



Description of the operation of the HVAC system during a remote vehicle start event.



OAT 48.2°F or colder (9°C) Between 48.2°-82.4°F (9°C – 28°C) 82.4°F or warmer (28°C)
MODE Detent 8 (Defrost -1) Detent 2 (Bi-Level -1) Detent 1 (Panel)
BLOWER 90% (Full Blwr) 45% (Half blwr) 90% (Full Blwr)
TEMP FULL HOT 25% off Full Cold Full COLD

Note: For the 2006/2007 C67 single zone equipped Impala and Monte Carlo: if the blower and mode are correct but the temperature is not correct, please refer to TSB 07-01-38-002.

Note: It is also important to note that if the vehicle sits for less than 3 hours after key off, the Outside Air Temperature (OAT) uses the last stored value which may be incorrect by the time you get back to the vehicle. This can effect HVAC operation during remote start.

Note: If the HVAC does not function as above, it will be necessary to reprogram the HVAC control head with the latest calibrations if there is one available for the year and make of the vehicle you are working on.

Note: You can update the Outside Air Temperature (OAT) on the DIC instantly by pressing the A/C button and the recirculation button at the same time.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.



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