PIT5178

Bulletin No.: PIT5178
Date: Nov-2012
Subject:
ABS/TCS MILs On And/Or Various Electrical Or Communications Issues
Models:
1998-2002 Chevrolet Express (with 6.5L Diesel Engine only)
1998-2002 GMC Savana (with 6.5L Diesel Engine only)
2003-2007 Chevrolet Express
2003-2007 GMC Savana
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Some customers may comment that the ABS/TCS MILs are on or of other various electrical issues. The technician may find there is no communication with the
EBCM or possibly any Class 2 modules when condition is present.
Recommendation/Instructions
If after normal diagnostics, a repair is not found the technician should inspect the braided ground strap from the engine to the frame for any concerns. Follow SI
diagnostics as necessary for any repairs to the ground strap.
Warranty Information
For wiring repairs covered under warranty, please refer to latest version of bulletin 10-00-89-005 for warranty information on wire/connector repairs.
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.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may
occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools,
safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that
your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
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