PIP4482C

Bulletin No.: PIP4482C
Date: Mar-2016
Subject:
(Hybrid) Supplement To Generator Control Module (PIM) Cooling System Draining And Filling Procedure
Models:
2009-2011 Cadillac Escalade Hybrid
2008-2011 Chevrolet Silverado Hybrid, Tahoe Hybrid
2008-2011 GMC Sierra Hybrid, Yukon Hybrid
This PI was superseded to update model years. Please discard PIP4482C.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Two types of DEX-COOL® 50/50 Premix are available through GMSPO, one with bitterant and one without. Bitterant is a chemical that is added to products to
make them smell or taste extremely bitter and is required in some states, such as California, Oregon, New Mexico, Colorado, and Vermont.
Recommendation/Instructions:
The part numbers are:
12378390 - DEX-COOL® 50/50 Premix WITHOUT bitterant (In Canada P/N 10953456, 3.78L)
88863460 - DEX-COOL® 50/50 Premix WITH bitterant (Not Available In Canada)
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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