PIT5212B

Bulletin No.: PIT5212B
Date: Aug-2013
Subject:
Diagnostic Tip - SES MIL On P0087 P0461 P2066 P128E P2632 P2633 P2634 Or P2636 Stored And Unable
To Command Transfer Pump On With Scan Tool
Models:
2013 Chevrolet Silverado 3500 Chassis Cab w/ Dual Fuel Tanks
2013 GMC Sierra 3500 Chassis Cab w/ Dual Fuel Tanks
with 6.6L Diesel Engine (RPO LML, LMM)
This PI was superseded to update subject line and keywords. Please discard PIT5212A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
A technician may report an SES MIL on with one or more of the following DTCs P0087 P0461 P2066 P128E P2632 P2633 P2634 P2636 stored, and also unable
to command transfer pump on with scan tool.
Recommendation/Instructions
Note: Perform the following BEFORE performing any repairs or replacing any parts
Verify the scan tool has been updated to S/W Version # 33.003 or higher.
Continue with published diagnostics from that point.
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.
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