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NHTSA ID Number: 10138641

Manufacturer Communication Number: PI1180

TSB/Document Date: 2018-05-29


Summary

This preliminary bulletin provides a procedure to reprogram the body control module to correct the customers concern of the intermittent no start and security lamp on.


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TSB/Document ID: PI1180

Replacement Service Bulletin Number:

MFR Communication Date: 2014-02-21

MFR Internal Campaign ID/Software Version:

Communication Type: Service Bulletin/Repair Instructions

NHTSA Components: ENGINE

MFR Component System:

MFR Component Subsystem:


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Bulletin No.: PI1180
Date: Feb-2014

Subject:

Intermittent No Start, Security Lamp Illuminated, DTCs B3935 and B2955 Set

Models:

2014 ChevroleteBay logo Silverado 1500
2014 GMCeBay logo Sierra 1500
2015 ChevroleteBay logo Silverado 2500/3500
2015 GMCeBay logo Sierra 2500/3500

Condition/Concern
Some customers may comment on a no start condition and that the security lamp is illuminated. Technicians may find DTCs B3935 and B2955 set.
This may be caused by the BCM not allowing a correct read of the Immobilizer information.

Recommendation/Instructions
An updated software calibration has been released to address this concern. Reprogram the BCM using the Service Programming System (SPS) with the latest
calibrations available on TIS2WEB. Refer to the Body Control Module Programming and Setup procedure in SI.
Note: This BCM Calibration will ONLY address a No-Start condition with codes B3935 and B2955 set. This is a No Click, No Crank, No Start condition - any
occurrences of Crank-No Start or Click-No Crank should be diagnosed using SI. This BCM software will NOT resolve these other symptoms. The BCM should
not be reprogrammed unless codes B3935 and B2955 are set.

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation

Description

Labor Time

2880218*

Body Control Module Reprogramming with SPS

0.5 hr

*This is a unique Labor Operation for Bulletin use only. It will not be published in the Labor Time Guide.

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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