PIC3557

File in Section:
Service Bulletin
Bulletin No.:
Date:
PIC3557
December, 2012
PRELIMINARY INFORMATION
Subject:
DTC U1000
Models:
2003-2005 Chevrolet Malibu (Classic)
2003-2005 Pontiac Grand-Am
2003-2005 Oldsmobile Alero
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
The diagnostics for a class 2 communications DTC U1000 may not lead a technician to a final repair.
Recommendation/Instructions
The vehicles in question were built without the oil level monitoring hardware. The software is supported by the PCM
and the PCM is looking for a signal input from the oil level sensor over class 2 communications. The technicians are
to disregard the DTC U1000 that may be set current or in history.
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.