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Service bulletins for the 2021 Chevrolet Tahoe

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.

1477 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
21NA0442021-07-06. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of SUV Vehicle Software Configuration Management Update (VeSCoM).
PIT58442021-06-14. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates an issue with the common / fleet key options for police vehicles. Currently, the common key option will not start vehicles with the same common key option and engineering is working on new BCM software to fix the issue.
PIC6384F2021-06-14. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE. This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.
PIP58062021-06-14. Service bulletin. ELECTRICAL SYSTEM. This preliminary information bulletin instructs to technicians to use the Picoscope or a make physical inspection to check for a suspected bent target wheel on the camshaft.
PIC64372021-06-14. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates the Radio may stay on after ignition off and door opened if there is an Over The Air update pending and to review SI document ID 5778263 for Over The Air update description and operation.
PIT58412021-06-14. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates information on a No Crank / No Start concern caused by a No Fob Detected message caused by an internal fault of the BCM. Dealer is to replace the BCM to correct this concern.
PIC6384E2021-06-14. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE. This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.
PIE06242021-06-07. Service bulletin. ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Liftgate Ajar Lamp illuminated on Driver Information Center (DIC) with the Liftgate being closed.
21NA0842021-05-24. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides a procedure to splice in a missing circuit to correct a condition where certain electronics and lighting installed after an upfit will not work in accessory mode.
PIP5748F2021-05-17. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates to the technition instructions to replace the particulate matter sensor for a P1488 and to use the special labor operation for tracking purposes.
21NA0682021-05-10. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. 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).
21NA0612021-05-10. Service bulletin. ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This service bulletin provides information for dealers on Using EL-52545 When Diagnosing PEPs Transmitter Key Fobs (North America ONLY).
21NA0602021-05-10. Service bulletin. ELECTRICAL SYSTEM. This service bulletin describes the TLC/SPS2 Module Programming Requirements for Vehicles Using GM?s New Vehicle Intelligence Platform (VIP) Module Architecture.
20NA1322021-05-03. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for battery testing and warranty replacements.
20NA1232021-05-03. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides repair information to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated with DTCs U1961, U1983 setting.
N2023261202021-04-26. Service bulletin. ELECTRICAL SYSTEM. Service Update. Certain vehicles may have incorrect calibration values in the Vehicle Leveling Module (VLM) software for air ride adaptive suspension. The incorrect calibration will use the incorrect loaded ride height which is 0.6 inches lower that the normal ride height. Dealers are to reprogram the VLM module.
PIT5817A2021-04-19. Service bulletin. ELECTRICAL SYSTEM. This Preliminary information communicates and issue with a SES MIL and the BCM keeping the ignition main relay on after the vehicle is turned off. Dealers are to replace the BCM.
PIC6384D2021-04-19. Service bulletin. ELECTRICAL SYSTEM; STRUCTURE. This Preliminary information communicates a parts restriction is in place for the Body Control Module on 2020 Cadillac CT4, CT5, Chevrolet Corvette, Suburban, Tahoe and GMC Yukon.
PIE0597A2021-03-08. Service bulletin. STRUCTURE:BODY:HATCHBACK/LIFTGATE; ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the power liftgate inoperative.
20NA2372021-03-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.. This service bulletin provides V152 radio software update information to correct customer concerns of various software issues.
20NA2082021-03-01. Service bulletin. EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; STRUCTURE. This technical bulletin provides repair information to correct a customer concern of Assist Step Running Boards Inoperable and Not Functioning with Door Operation.
PIE0601A2021-03-01. Service bulletin. ENGINE; ELECTRICAL SYSTEM. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the Service Engine Soon Lamp being illuminated.
PIE0599B2021-03-01. Service bulletin. ELECTRICAL SYSTEM; AIR BAGS. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to the airbag lamp illuminated on the driver?s information center (DIC).
N202310850 022021-03-01. Service bulletin. ELECTRICAL SYSTEM; SEATS; ENGINE AND ENGINE COOLING; EQUIPMENT; AIR BAGS. Customer Satisfaction Program (Revised Service Procedure and Part Ordering Information). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.
N202310850 Reope2021-03-01. Service bulletin. EQUIPMENT; SEATS; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Customer Satisfaction Program (VINS re-opened, software updated). In certain vehicles, driver movement can disrupt the electrical connection to the seat-mounted inboard airbag system. This airbag system is supplemental and not required equipment under applicable Federal Motor Vehicle Safety Standards. If this occurs, the vehicle?s driver information center will display a ?Service Restraints System? message to the driver before resistance at the connection will prevent the deployment of the airbag. Dealers are to verify the DTC B14DC is present and replace the affected driver inboard side seat wiring harness connector assembly as necessary.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.