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Service bulletin SB-12118

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 id10045041
Published by NHTSA2012-08-14
Manufacturer's numberSB-12118
Manufacturer's date2012-06-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS; ENGINE

NHTSA's summary

GMC/CHEVROLET: IF NOT TORQUED TO SPECIFICATION, ON CERTAIN TRUCKS, BOLTS ON 4 WATER PUMP PULLEY, COULD BACK OUT OR BREAK. *PE

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

Engine, Drive belts

Vehicles listed
CHEVROLET SILVERADO2012
GMC SIERRA2012

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