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Service bulletin 21NA068

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 id10192034
Published by NHTSA2021-05-10
Manufacturer's number21NA068
Manufacturer's date2021-03-17
NHTSA componentELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER

NHTSA's summary

This warranty administration bulletin provides policy information requirements applicable to key fob replacement under the New Vehicle Limited Warranty or under a Replacement Parts Warranty on 2021 and newer model year vehicles with RPO ATH (U.S. Only).

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, Ignition

Vehicles listed
BUICK ENCLAVE2021
BUICK ENCORE2021
BUICK ENCORE GX2021
BUICK ENVISION2021
CADILLAC CT42021
CADILLAC CT52021
CADILLAC ESCALADE ESV2021
CADILLAC ESCALADE NA2021 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC XT42021
CADILLAC XT52021
CADILLAC XT62021
CHEVROLET 4500XD2021
CHEVROLET BLAZER2021
CHEVROLET BOLT EV2021, 2022
CHEVROLET CAMARO2021
CHEVROLET COLORADO2021
CHEVROLET CORVETTE2021
CHEVROLET EQUINOX2021
CHEVROLET EXPRESS2021
CHEVROLET MALIBU2021
CHEVROLET SILVERADO 15002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 35002021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SPARK2021
CHEVROLET SUBURBAN2021
CHEVROLET TAHOE2021
CHEVROLET TRAILBLAZER2021
CHEVROLET TRAVERSE2021
CHEVROLET TRAX2021
GMC ACADIA2021
GMC CANYON2021
GMC SAVANA2021
GMC SIERRA 15002021 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002021 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2021
GMC YUKON2021
GMC YUKON XL2021

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
PIT6015A2024-04-15. Service bulletin. This Preliminary information communicates Diagnostic Tips When Having Difficulties Programming Or Adding Key Fobs / Transmitters.
PIT6006B2024-04-15. Service bulletin. This Preliminary information communicates where to find the back antenna for learning new key fobs.
PIT6006A2024-03-18. Service bulletin. This Preliminary information communicates where to find the back antenna for learning new key fobs.
PIC65282023-12-18. Service bulletin. Translation of engineering terms to service terms found in the service programming system during Immobilizer System Component Programming.
PIC5650K2023-06-13. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.
PIT5993A2023-05-15. Service bulletin. This Preliminary information communicates an issue with high resistance in the glass breakage loop that could cause a dead battery or unwanted theft alarm. Dealers are to inspect the glass breakage loop.
21-NA-2442023-02-07. Service bulletin. This service bulletin provides a repair procedure to correct a customer concern of a No Fob detected message on Driver Information Center (DIC) and/or No Crank / No Start condition.
22-NA-1072022-08-03. Service bulletin. This service bulletin provides repair information to correct a customer concern of a Service AWD Message in DIC at Ignition On with DTC C056D Set.
PIC6433A2022-05-16. Service bulletin. This Preliminary information communicates that a service theft deterrent message may display with no DTC's. OnStar turned off the ECM read request to prevent re-occurrence.
21NA2892022-02-14. Service bulletin. This technical bulletin provides a procedure to inspect the ceramic portion of the sparkplug for cracking and to replace if found the cause of the customers concern.