# 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. - Type: Service bulletin - NHTSA id: 10192031 - Published by NHTSA: 2021\-05\-10 - Manufacturer's number: 21NA061 - Manufacturer's date: 2021\-03\-22 - NHTSA component: ELECTRICAL 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 - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10192031-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10192031-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system, Ignition ## Vehicles listed - 2020 to 2021 BUICK ENCLAVE - 2020 to 2021 BUICK ENCORE - 2020 to 2021 BUICK ENCORE GX - 2020 to 2021 BUICK ENVISION - 2020 BUICK REGAL - 2020 to 2021 CADILLAC CT4 - 2020 to 2021 CADILLAC CT5 - 2020 CADILLAC CT6 - 2020 CADILLAC ESCALADE - 2020 to 2021 CADILLAC ESCALADE ESV - 2021 CADILLAC ESCALADE NA - 2020 to 2021 CADILLAC XT4 - 2020 to 2021 CADILLAC XT5 - 2020 to 2021 CADILLAC XT6 - 2020 CHEVROLET 3500 - 2020 CHEVROLET 4500HD - 2021 CHEVROLET 4500XD - 2020 CHEVROLET 5500HD - 2020 to 2021 CHEVROLET BLAZER - 2020 to 2021 CHEVROLET BOLT EV - 2020 to 2021 CHEVROLET CAMARO - 2020 to 2021 CHEVROLET COLORADO - 2020 to 2021 CHEVROLET CORVETTE - 2020 to 2021 CHEVROLET EQUINOX - 2020 to 2021 CHEVROLET EXPRESS - 2020 CHEVROLET IMPALA - 2020 to 2021 CHEVROLET MALIBU - 2020 to 2021 CHEVROLET SILVERADO 1500 - 2020 to 2021 CHEVROLET SILVERADO 2500 - 2021 CHEVROLET SILVERADO 3500 - 2020 CHEVROLET SILVERADO 4500 - 2020 CHEVROLET SONIC - 2020 to 2021 CHEVROLET SPARK - 2020 to 2021 CHEVROLET SUBURBAN - 2020 to 2021 CHEVROLET TAHOE - 2020 CHEVROLET TRAILBLAZER - 2021 CHEVROLET TRAILBLAZER - 2020 to 2021 CHEVROLET TRAVERSE - 2020 to 2021 CHEVROLET TRAX - 2020 to 2021 GMC ACADIA - 2020 to 2021 GMC CANYON - 2020 to 2021 GMC SAVANA - 2020 to 2021 GMC SIERRA 1500 - 2020 to 2021 GMC SIERRA 2500 - 2020 to 2021 GMC TERRAIN - 2020 to 2021 GMC YUKON - 2020 to 2021 GMC YUKON XL ## Other bulletins for the same vehicles and component - [PIT6015A](/bulletins/10253102.md), 2024-04-15, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This Preliminary information communicates Diagnostic Tips When Having Difficulties Programming Or Adding Key Fobs / Transmitters. - [PIT6006B](/bulletins/10253074.md), 2024-04-15, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This Preliminary information communicates where to find the back antenna for learning new key fobs. - [PIT6006A](/bulletins/10251699.md), 2024-03-18, Service bulletin: LATCHES/LOCKS/LINKAGES; ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This Preliminary information communicates where to find the back antenna for learning new key fobs. - [PIC5650K](/bulletins/10237659.md), 2023-06-13, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM:IGNITION. 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. - [PIT5993A](/bulletins/10236168.md), 2023-05-15, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:CONTROL MODULE. 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\-244](/bulletins/10231404.md), 2023-02-07, Service bulletin: ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. 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\-107](/bulletins/10217070.md), 2022-08-03, Service bulletin: ELECTRICAL SYSTEM:IGNITION; POWER TRAIN. 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. - [21NA289](/bulletins/10207925.md), 2022-02-14, Service bulletin: ELECTRICAL SYSTEM:IGNITION:COIL:SPARK PLUGS. 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. - [21NA255](/bulletins/10205575.md), 2021-12-27, Service bulletin: ELECTRICAL SYSTEM:IGNITION:COIL:SPARK PLUGS; ENGINE. This service bulletin provides repair information to correct a customer concern of an Engine Misfire, Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P0300 Set. - [PIP5657D](/bulletins/10201263.md), 2021-09-13, Service bulletin: ELECTRICAL SYSTEM:IGNITION:COIL:HIGH TENSION/SPARK PLUG WIRES. This Preliminary information communicates the possibility of a misfire occuring due to a broken center insulator on the spark plug. JSON: [/v1/bulletins/10192031](/v1/bulletins/10192031) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2021NA061&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10192031&vehicle=Service%20bulletin%2021NA061)