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Service bulletin 14616

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 id10247224
Published by NHTSA2023-12-18
Manufacturer's number14616
Manufacturer's date2014-11-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM); UNKNOWN OR OTHER

NHTSA's summary

Service 4WD Message ? Transfer Case Stuck in 4WD HI

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

Engine, Engine control module

Vehicles listed
CADILLAC ESCALADE2015
CADILLAC ESCALADE ESV2015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002015 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2015
CHEVROLET TAHOE2015
GMC SIERRA 25002015 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2015
GMC YUKON XL2015

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
PIP5628F2023-05-15. Service bulletin. This Preliminary information communicates information that will need to be provided to TAC to aid in diagnosing if a vehicle comes in with misfire and DTC Codes P0300 - P0308 and/or P050D
21NA0102021-03-01. Service bulletin. This technical bulletin provides a procedure to reset the DTCs and take the vehicle for a test drive to verify the codes do not return.