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Service bulletin 21NA061

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 id10192031
Published by NHTSA2021-05-10
Manufacturer's number21NA061
Manufacturer's date2021-03-22
NHTSA componentELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER

NHTSA's summary

This service bulletin provides information for dealers on Using EL-52545 When Diagnosing PEPs Transmitter Key Fobs (North America 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 ENCLAVE2020, 2021
BUICK ENCORE2020, 2021
BUICK ENCORE GX2020, 2021
BUICK ENVISION2020, 2021
BUICK REGAL2020
CADILLAC CT42020, 2021
CADILLAC CT52020, 2021
CADILLAC CT62020
CADILLAC ESCALADE2020
CADILLAC ESCALADE ESV2020, 2021
CADILLAC ESCALADE NA2021 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC XT42020, 2021
CADILLAC XT52020, 2021
CADILLAC XT62020, 2021
CHEVROLET 35002020
CHEVROLET 4500HD2020
CHEVROLET 4500XD2021
CHEVROLET 5500HD2020
CHEVROLET BLAZER2020, 2021
CHEVROLET BOLT EV2020, 2021
CHEVROLET CAMARO2020, 2021
CHEVROLET COLORADO2020, 2021
CHEVROLET CORVETTE2020, 2021
CHEVROLET EQUINOX2020, 2021
CHEVROLET EXPRESS2020, 2021
CHEVROLET IMPALA2020
CHEVROLET MALIBU2020, 2021
CHEVROLET SILVERADO 15002020, 2021 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002020, 2021 (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 SILVERADO 45002020 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SONIC2020
CHEVROLET SPARK2020, 2021
CHEVROLET SUBURBAN2020, 2021
CHEVROLET TAHOE2020, 2021
CHEVROLET TRAILBLAZER2020
CHEVROLET TRAILBLAZER2021
CHEVROLET TRAVERSE2020, 2021
CHEVROLET TRAX2020, 2021
GMC ACADIA2020, 2021
GMC CANYON2020, 2021
GMC SAVANA2020, 2021
GMC SIERRA 15002020, 2021 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002020, 2021 (the catalog's model; the bulletin names a series or trim of it)
GMC TERRAIN2020, 2021
GMC YUKON2020, 2021
GMC YUKON XL2020, 2021

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.
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.
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.
21NA2552021-12-27. Service bulletin. This service bulletin provides repair information to correct a customer concern of an Engine Misfire, Malfunction Indicator Lamp (MIL) Illuminated - DTC P0300 Set.
PIP5657D2021-09-13. Service bulletin. This Preliminary information communicates the possibility of a misfire occuring due to a broken center insulator on the spark plug.