21-NA-135
Service Bulletin Details
Public Details for: 21-NA-135
This service bulletin provides information to inform dealership personnel about law enforcement and government vehicles that request to disable or enable content.
- 2023 - 2022 - 2021 - 2020 - 2019 -
Models from 2023
Models from 2022
Models from 2021
Models from 2020
Models from 2019
Bulletin No.: Service Bulletin Date: 21-NA-135 January, 2023 INFORMATION Subject: Information on Obtaining Techline Calibrations for Law Enforcement and Government Vehicles to Disable or Enable Content Model Year: Brand: Model: Buick GM Passenger Cars and Light Duty Trucks Excluding: 2022 Silverado 1500 New (RPO J22, VIN Digit 5 = A / D) 2023 Silverado 1500 2022 Sierra 1500 New (RPO J22, VIN Digit 5 = H / U 2023 Sierra 1500 Cadillac Chevrolet GMC VIN: from to from to 2019 2023 — — Engine: Transmission: — — Involved Region or Country United States and Canada Condition The purpose of this bulletin is to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content. Cause In some cases, it is not possible to disable/enable a feature. Contact the Techline Customer Support Center (TCSC) to see if disabling/enabling the desired feature is possible for the specific vehicle. The agency/requestor should be reminded that any disabled features should be made fully operational or disclosed PRIOR to sale of the vehicle. Correction Follow this process to obtain the calibration to make the above vehicle modifications. In General Motors continuous effort to provide customer support, the following process is in effect for those select governmental agencies that require and qualify for enabling/ disabling certain features. Techline will provide the appropriate software change and instruct the technician how to complete the reconfiguration. Note: Check the Upfitter site for additional information for certain models/upfits. Note: This is a customer pay repair. Copyright 2023 General Motors LLC. All Rights Reserved. Page 2 January, 2023 Service Procedure Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws applicable to the activities it performs under this bulletin, including but not limited to handling, deploying, preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you must follow those applicable laws. Important: In Canada, disabling DRL is prohibited by Transport Canada. 1. ONLY the following governmental agencies qualify for this disable/enable calibration request: • City / State / Provincial Government • Police / Sheriff Departments • FBI • CIA • DEA • RCMP • Emergency Vehicles – if government owned 2. All requests are to be made through the Techline Customer Support Center (TCSC) at 1-800-828-6860 English or 1-800-503-3222 French. 3. The dealership will be required to obtain a letter on official agency letterhead requesting the disable/ enable. The letter should include the following: • Acknowledgement that the agency owns the vehicle • The reason for the disable/enable • Which features are to be disabled/enabled • Specific VIN(s) of the vehicle(s) that features will be disabled/enabled Bulletin No.: 21-NA-135 • Prior to any sale of the vehicle(s) listed above, the agency will either (1) ensure that the [insert feature(s) which has/have been requested for disable/enable] system will be made fully operational, or (2) disclose to the end customer that such system is not operational. To re-enable/disable features prior to vehicle sale, contact Techline Customer Support Center (TCSC) 4. The letter must be kept in the service history file at the dealership, and a copy sent to TCSC before the disable/enable procedures/calibrations will be released. In most cases, the vehicle(s) will require a software change, using a VCI number provided by the TCSC. This is a list of calibrations that are available: 6N5 BCV BCN 9G8 UTQ 6J7 5J1 5J3 7Y6 UTJ SK5 SK0 SK3 SK4 Engine time out disable (some models) DRL disable Version 4 Modified Released June 10, 2021 Revised September 14, 2021 – Added the 2022 Model Year, a Note in the Correction section and RPOs SK5, SK0, SK3, SK4. Revised February 04, 2022 – Updated the Cause and #3 under Service Procedure. Revised January 13, 2023 – Added excluded vehicles under Model section, the 2023 Model Year and the first Important statement under Service Procedure. Additional SI Keywords: Idle, 5W4, Police, 9C1, Light, DRL GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION