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Service bulletin 18NA012

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 id10139250
Published by NHTSA2018-06-04
Manufacturer's number18NA012
Manufacturer's date2018-01-16
NHTSA componentELECTRICAL SYSTEM:STARTER ASSEMBLY:SOLENOID

NHTSA's summary

This technical bulletin provides a procedure to replace the trans control solenoid assembly if found the cause of the vehicle unable to crank the engine over.

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, Starter

Vehicles listed
CHEVROLET SILVERADO2017
CHEVROLET SILVERADO 25002018 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2017, 2018
CHEVROLET TAHOE2017, 2018
GMC SIERRA 25002018 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2018 (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
17NA4022018-06-04. Service bulletin. This technical bulletin provides a procedure to replace relays that may be sticking in cold regions.
16-NA-3462018-05-21. Service bulletin. This technical bulletin provides repair information to correct a customer concern of no crank / no start.
PIP55532018-03-12. Service bulletin. This Preliminary information communicatesThe vehicle may have an ses lamp with any of the following DTC P06DA, P06DB, P06DC, P06B6, P06B7, P250A, P0300, P0340, P0341, P0335, P0336, P0641, P0011, P0010, P2088, P2089, and/or P2230. Possible crank no start or a stall. possible wiring jumper harness chaffed at the bolt at the X154 connector on lower left side of the frount cover.