mtcrumb
TYF Newbie
Having a problem with the musty odor on start up of 2008 Tahoe. Had it at the dealer yesterday for service and was told nothing could be done. I started looking around and found this on another site. Have any of you had this done and did it fix the problem? Thanks
TIP: Do not enable the afterblow function until its purpose and operation are explained to the customer and they approve the change.
Once the afterblow option has been enabled, the blower motor will turn on approximately 10 minutes after the vehicle is shut off. The blower motor will run continuously for 10 minutes at a 30% duty cycle. The afterblow function will activate only if the air conditioning compressor was engaged during conditions of high ambient temperature. If the vehicle is started within 10 minutes of the last key off, the afterblow function from the previous key cycle will be cancelled.
Turn this option ON in the HVAC Control Module instead of installing the Electronic Evaporator Dryer Module Kit referred to in the Air Conditioning Odor bulletin 99-01-39-004A.
To enable afterblow:
1. Verify the Tech 2 is updated with the latest software.
2. “Build” the vehicle on the Tech 2.
3. Use the following Tech 2 pathing:
Vehicle Control Systems > Select engine > Module Setup > HVAC Control Module > Afterblow Option
4. Follow the on-screen directions.
TIP: Do not enable the afterblow function until its purpose and operation are explained to the customer and they approve the change.
Once the afterblow option has been enabled, the blower motor will turn on approximately 10 minutes after the vehicle is shut off. The blower motor will run continuously for 10 minutes at a 30% duty cycle. The afterblow function will activate only if the air conditioning compressor was engaged during conditions of high ambient temperature. If the vehicle is started within 10 minutes of the last key off, the afterblow function from the previous key cycle will be cancelled.
Turn this option ON in the HVAC Control Module instead of installing the Electronic Evaporator Dryer Module Kit referred to in the Air Conditioning Odor bulletin 99-01-39-004A.
To enable afterblow:
1. Verify the Tech 2 is updated with the latest software.
2. “Build” the vehicle on the Tech 2.
3. Use the following Tech 2 pathing:
Vehicle Control Systems > Select engine > Module Setup > HVAC Control Module > Afterblow Option
4. Follow the on-screen directions.
