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Service bulletin PIT4811C

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10154570
Published by NHTSA2019-03-18
Manufacturer's numberPIT4811C
Manufacturer's date2018-12-07
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

This Preliminary Information communication provides the technician with the steps on how to diagnose vehicles with a no crank with multiple Diagnostic Trouble Codes set in several different modules with Regular Production Option Code HP2. Technician will retrieve all the Diagnostic Trouble Codes that are set current in the vehicle. When there are multiple Diagnostic Trouble Codes technician may wonder were to start the diagnose process. Technician will address Diagnostic Trouble Codes P1AE2-P1AE4, P1B05, or P1B06 first as they're related to the High Voltage System Interlock Circuit for the high voltage system. Second Diagnostic Trouble Codes to address will be any loss of communication Diagnostic Trouble Codes related to the Powertrain expansion bus or the high speed LAN bus. Then address any low voltage concerns that may be related to a low 12 volt battery.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Trouble codes named

P1AE2, P1AE4, P1B05, P1B06

Vehicles listed
CADILLAC ESCALADE2009, 2010, 2011, 2012, 2013
CHEVROLET SILVERADO 15002009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002012 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002013 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TAHOE HYBRID2008, 2009, 2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON HYBRID2008, 2009, 2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20165972016-11-29. Electrical
20150022014-12-30. Electrical
14V8270002014-12-30. ELECTRICAL SYSTEM:IGNITION
20144322014-10-03. Electrical
14V6140002014-10-01. ELECTRICAL SYSTEM
20142772014-07-03. Electrical
14V4070002014-07-02. ELECTRICAL SYSTEM
10V2400002010-06-04. ELECTRICAL SYSTEM
08V4410002008-08-28. ELECTRICAL SYSTEM

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
25-NA-0872025-05-02. Service bulletin. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
23-NA-0012025-04-28. Service bulletin. This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
13-08-116-001K2025-04-25. Service bulletin. The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple customer concerns that do not have other diagnostic methods to identify them.
15-06-03-001F2025-04-15. Service bulletin. This service bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.
21-NA-0432025-02-12. Service bulletin. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
09-06-04-026Z2025-01-23. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
PIT5962B2024-12-12. Service bulletin. This Preliminary information communicates a GM part number for reflective high temperature heat or insulating tape when repairing wiring harnesses.
20-NA-1322024-11-09. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIT5698E2024-10-25. Service bulletin. This Preliminary information communicates additional information on how a LIN bus operates and diagnostic tips when working on a LIN bus.
PIP4723J2024-10-25. Service bulletin. This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8 starting/charging tester and Vehicle Data Recorder tools, giving website address and step by step instructions to complete the update.