PIT5066A

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIT5066A
November, 2014
PRELIMINARY INFORMATION
Subject:
Intermittent Battery Draw Dead Battery Or HVAC Odor
Models:
2008-2011 Buick Enclave
2009-2011 Chevrolet Traverse
2007-2011 GMC Acadia
2007-2010 Saturn OUTLOOK
2007-2011 Cadillac Escalade Models
2007-2011 Chevrolet Silverado, Avalanche, Suburban, Tahoe
2007-2011 GMC Sierra, Yukon Models
This PI was superseded to update Recommendation/Instructions. Please discard PIT5066.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may report that their vehicle will not crank intermittently due to a dead battery
It has been identified through Engineering that there is a potential for the HVAC afterblow function to cause an
intermittent battery draw.
Recommendation/Instructions
If no other vehicle system or component is identified as the root cause for the battery drain condition and the
afterblow function is enabled, reprogram the HVAC Control Module with the latest calibration currently available in
TIS2WEB.
Warranty Information
For vehicles repaired under warranty use:
Labor Operation
Description
Labor Time
2810015
K33 HVAC System Control Module
Reprogramming
Use Published Labor
Operation 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.