PIT4780M

Bulletin No.: PIT4780M
Date: Apr-2013
Subject:
Parallel Hybrid Truck (PHT) Part Restriction
Models:
2004-2007 Chevrolet Silverado Classic
2004-2007 GMC Sierra Classic
All With RPO HP2
This PI was superseded to update parts and warranty information. Please discard PIT4780L.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
Effective 6/15/04 the following Parallel Hybrid Truck (PHT) parts are on restriction through the GM Technical Assistance Center (TAC):
Notes
Service Procedure
SI Doc ID
Labor Code
Name
Part
Number
Service
Programming
Generator Phase
19117643
Requalified
Generator Control Module 3Phase Cable Assembly
Replacement
1285077
N5792
N/A
19117206
Remanufactured
(Core Charges
Apply)
Generator Stator
Replacement
1198589
N5851
N/A
19117231
Order until Stock is
depleted
(Supersedes
19116094)
Generator Battery Control
Module Replacement
1710595
N5865
Yes
19117111
Recertified - Core
Charges Apply
(Supersedes
Generator Control Module
Replacement
1710671
N5863
Yes
Generator Battery
Replacement
1198523
N5794
Reset Amp Hours
Part
Cables
Generator
Stator
Battery Energy Control
Module ESCM /
BECM
Starter Generator Control
Module /
SGCM
12601238)
Batteries (Under rear
89021957
seat)
(Use EL-42000-30
Adapters when
testing)
Recommendation/Instructions
Note:
– When ordering the AGM Hybrid Batteries, the Midtronics Battery Tester Failure Codes/Information is needed prior to calling TAC. Failure to test using the
proper test adapters and SI procedure may result in inaccurate results or misdiagnosis.
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– When replacing the Stator it is recommended to also replace the Phase Cable Set at that time.
– When programming the ESCM / BECM it may be necessary to select the "Tech2 Remote" method in TIS.
If diagnosis leads to replacement of any of the components listed above, contact GM TAC @ 877-446-8227 (U.S.) or in Canada 1-800-263-7740 (English) or 1800-263-7960 (French) to review case details. Please have as much stored DTC and snapshot information as possible prior to contacting TAC.
Note: After reviewing the diagnosis, if component replacement is needed, GM TAC will arrange for ordering of the part(s). When this occurs, record the last 9
digits of the TAC case number to be used by the parts department as the CONTROL NUMBER (in conjunction with the part number) to track shipment of the
part. It is not necessary to call TAC for part tracking information.
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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