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HVAC Operation During Remote Start - keywords ac a/c remote RKE RVS start vehicle vent

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This PI was superseded to add model years.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.

Condition/Concern:

Operation of the HVAC controls on the Grand Prix, LaCrosse, and Allure during a remote start event.

Recommendation/Instructions:

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.