Rear Cargo Doors AC Inoperative After BCM Replacement - keywords air a/c blows body condition control hot HVAC inop installed int intermittent module panel replaced

This PI was superseded to clarify the recommended diagnostic instructions. Please discard PIC4771.

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

A software concern has been identified that could cause some Body Control Module (BCM) functions to become inoperative after a BCM replacement for another reason.

Chevrolet HHR (Panel Van) Only:

The rear panel/cargo doors become inoperative "electronically" from the dash switches and the key fobs. The doors will still open from the manual inside door handles. The Air Conditioning also becomes inoperative.

Chevrolet HHR (NON-Panel), Daewoo G2x, Opel GT, and Saturn Sky

The Air Conditioning becomes inoperative.

If just the Air Conditioning is inoperative it's important to know the BCM has disabled the A/C software in the ECM and the BCM both. The BCM tells the ECM that the vehicle does not have A/C, so the ECM configures A/C off and doesn't execute the A/C software.

The PCM will disable the functionality software which is reflected by the pressure sensor data of 0 psi & 0 volts in the PCM data list.

If the vehicle shows any of the above concerns, it will be necessary to call Techline Support center for a VCI number at 1-800-828-6860.

Note: This concern is scheduled to be fixed in the next Tech-2 release.

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.