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Service bulletin 18NA039

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 id10137323
Published by NHTSA2018-05-21
Manufacturer's number18NA039
Manufacturer's date2018-02-07
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM

NHTSA's summary

This technical bulletin provides a procedure to reprogram the memory set module to correct a condition of Personalization Selections Intermittently Missing from Comfort and Convenience Menu due to a calibration concern.

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, Software

Vehicles listed
BUICK ENVISION2017, 2018
CADILLAC ATS2017
CADILLAC CT6 PLUG-IN HYBRID2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC CTS2017
CADILLAC ESCALADE2017, 2018
CADILLAC ESCALADE ESV2017, 2018
CHEVROLET IMPALA2017, 2018
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 SIERRA2017
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)
GMC YUKON2017, 2018
GMC YUKON XL2017, 2018

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

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17NA2912019-11-25. Service bulletin. This technical bulletin provides a procedure to replace the radio for vehicles with the condition of Intermittent Pop Noise from the Speakers Followed by a Reset of the Radio and Clock due to a software issue.
PIT5448E2019-08-12. Service bulletin. This Preliminary Information communication advises the technician with a tip when the vehicle stops running after it has been idling for 2.5 hours. This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.