PIT4649B

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIT4649B
March, 2013
PRELIMINARY INFORMATION
Subject:
Service Engine Soon MIL With P1682 And/Or Battery Draw And/Or No Start Due To
Non-GM Accessories After-market Product
Models:
2008-2013 Buick Enclave
2009-2013 Chevrolet Traverse
2007-2013 GMC Acadia
2007-2010 Saturn Outlook
This PI was superseded to update model years and subject, and add warranty information.
Please discard PIT4649A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment on the Service Engine Soon (SES) light coming on, or the battery going dead
overnight. During diagnosis technicians may find a 4.1 amp draw on the electrical system. The draw may be steady
or may drop down to a low milliamp reading for 1-2 seconds and then rise back up near 4.1 amps.
This concern may be caused by a non-GM Accessories after-market product or an improperly installed GM
Accessories product that is wired into circuit 1732 for the courtesy lamps. Anytime an after-market accessory is
installed into the courtesy lamp circuit, the inadvertent power timer in the body control module (BCM) may
continuously reset. If this occurs the BCM may remain awake causing excessive battery drain.
Recommendation/Instructions
When servicing a vehicle with this concern, back out pin 1 of connector 2 at the BCM and see if the draw goes away.
If the draw goes away, check for an after-market accessory (LoJack, non-factory DVD system, alarm, etc.) that is
improperly wired into circuit 1732.
Warranty Information
If the root cause is identified as a non-GM Accessories after-market product, a warranty claim should NOT be filed
against the repair, rather, this should be customer pay item.
ADDITIONAL SI KEYWORDS:
aftermarket
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.