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Service bulletin 15114

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 id10089893
Published by NHTSA2017-01-30
Manufacturer's number15114
Manufacturer's date2015-07-08
NHTSA componentELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES; ENGINE

NHTSA's summary

15114 - SPECIAL COVERAGE. ON SOME 2010-2012 MODEL YEAR CHEVROLET SILVERADO HD AND GMC SIERRA HD OR 2011-2012 CHEVROLET EXPRESS AND GMC SIERRA HD VEHICLES EQUIPPED WITH A 6.6L DURAMAX DIESEL ENGINE (RPO LML, LGH) THE MALFUNCTION INDICATOR LAMP (MIL) MAY ILLUMINATE DUE TO A CONDITION WITH THE GLOW PLUGS. WHEN DIAGNOSED, REPLACEMENT OF ONE OF THE ENGINES GLOW PLUGS MAY BE REQUIRED. NO DRIVABILITY ISSUES ARE GENERALLY ASSOCIATED WITH THIS ISSUE, BUT HARDER STARTING IN COLD AMBIENT TEMPERATURES MAY BE NOTED. DEALERS ARE TO REPLACE THE AFFECTED GLOW PLUG.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Engine, 12-volt battery

Vehicles listed
CHEVROLET EXPRESS2010, 2011, 2012
CHEVROLET SILVERADO 15002011, 2012 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002011, 2012 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002011, 2012 (the catalog's model; the bulletin names a series or trim of it)
GMC SANANA2010
GMC SAVANA2010, 2011, 2012
GMC SIERRA 15002011, 2012 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002011, 2012 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 35002011, 2012 (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.

Other bulletins for the same vehicles and component
20-NA-1322024-04-05. Service bulletin. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
PIT5066A2023-12-26. Service bulletin. Intermittent Battery Draw Dead Battery Or HVAC Odor.
PIT5074H2023-12-11. Service bulletin. J-35616-64B Terminal Test Probe / Replacement Terminal / Terminated Lead.
PIT5074G2023-12-11. Service bulletin. Terminal Test Probe And Replacement Terminal.
PIT5066A2023-12-11. Service bulletin. Intermittent Battery Draw Dead Battery Or HVAC Odor.
030603004V2019-05-13. Service bulletin. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
PIT4585F2019-04-08. Service bulletin. This Preliminary Information communication provides information to the technician that the Serial Data Gateway Module (SDGM) may report "Crash Sense Failed" and the 300v Hybrid Battery Contactors will remain open until the Hybrid Powertrain Control Module's (HPCM) High Voltage (HV) DTCs are reset. And How to Reset.
110849001Y2019-03-25. Service bulletin. This technical bulletin provides information on Transport Mode On Message Displayed in Driver Information Center (DIC) and/or Battery Light is Flashing and the procedures to turn the Transport Mode message On and Off.
03-06-03-003D2018-06-04. Service bulletin. This warranty administration bulletin provides policy information on ACDelco® replacement battery warranty procedures.
150603001D2018-06-04. Service bulletin. This informational bulletin provides information to diagnose batteries that have set for a long period of time and/or cold weather climates and testing those batteries.