Subject: | HVAC Operation During Remote Start |
Models: | 2005-2008 Buick Allure (Canada Only) |
2005-2008 Buick LaCrosse |
2005-2008 Pontiac Grand Prix |
This PI was superseded to add model years. Please discard PIC3780B.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Operation of the HVAC controls on the Grand Prix, LaCrosse, and Allure during a remote start event.
See chart below.
05-08 GMX367/365 C67 HVAC REMOTE START | |||||||
Outside Ambient | Blower Status | Mode | Temp Status | A/C Compressor Status | Recirc / OSA | Defrost | |
Temperature = 90F | Hi Blower | Vent | Full Cold | On | Recirc | Off | |
90F > Temperature > 37F | Blower setting at last key off | Mode setting at last key off | Temp setting at last key off | On | OSA | Off | |
Temperature = 37F | Hi Blower | Defroster | Full Hot | Off | OSA | On | |
05-08 GMX367/365 CJ2 HVAC REMOTE START | |||||||
Outside Ambient | Blower Status | Mode | Temp Status | A/C Compressor Status | Recirc / OSA | Defrost | |
Temperature = 90F | Hi Blower | Vent | Full Cold | On | Recirc | Off | |
90F > Temperature > 37F | Auto | Auto | Auto | Auto | Auto | Off | |
Temperature = 37F | Hi Blower | Defroster | Full Hot | Off | OSA | On |
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.