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Technical Bulletins TEST

Technical Bulletins provide up-to-date information on issues that come up during the model year. These issues require a more immediate distribution of technical information than the annual Body Builder Manuals can provide. The need for a technical bulletin may be driven by one of the following:

  • Mid-year design change to the vehicle that affects upfitter modifications
  • Information from a GM Service Bulletin that specifically affects upfitter modifications
  • Frequent submissions involving one particular issue that many upfitters encounter
Light Duty
Vehicles include the Canyon/
Colorado, Sierra/Silverado,
Express/Savana, Tahoe/Yukon/
Suburban, Uplander, etc.
Medium Duty
Vehicles include the
Top Kick/Kodiak, the
W, T, N, and F-Series,
etc.
Passenger
Vehicles include the
Caprice, Impala, Malibu,
and Volt
To find applicable bulletins select the appropriate information from the pull down menus for a specific search.

File

Number

Date Posted

Description

File Number Date Posted Description
206 10/30/2025 Information on Hesitation and/or Misfire Sensation When Passing Under High Voltage Transmission (Power) Lines - Multiple Intermittent ABS DTCs Set
205 10/30/2024 9L7 Upfitter AUX Switches - Higher Trim Levels
204 10/08/2024 Tahoe PPV/SSV Emergency Lighting and Aftermarket Equipment- Liftgate Struts Warning
203c 01/28/2026 UVM (Universal Vehicle Module) Information
202 06/26/2024 Backup Alarm Installation Recommendations
200 02/04/2025 Upfitter Power Provisions Silverado EV
199 02/20/2024 Silverado EV - Exterior Panel Dimensions
198 02/04/2025 High Voltage Disabling/Enabling Various EV Models
197 11/15/2023 BrightDrop ZEVO Exterior Panel Dimensions
196 02/04/2025 Adding Upfitter Switches (9L7) - BrightDrop Zevo Vans
195 08/04/2023 Cautionary – NO Drill/Air Bag Zones Chevrolet Silverado EV
194 08/01/2023 Identifying Taillamp Type and Wiring Configurations - 2024 HD Full-Size Trucks
193f 10/30/2025 Installation of Upfitter (AUX) Switches (9L7) components (2022i - 2025 Full-size Trucks) Preliminary
192 08/29/2023 BrightDrop Zevo Delivery Inspection Training Video and Forms
191 07/25/2023 Cautionary – NO Drill/Air Bag Zones – Zevo Cargo Van
190 04/06/2023 Battery Negative Cable Disconnection and Connection - Bright Drop Zevo 600
189 04/06/2023 EV - High Voltage Safety
188 02/04/2025 Adding Ignition and Battery powered circuits for upfitter use – BrightDrop Zevo cargo vans.
187 07/12/2022 Adding Equipment to Vehicles with Air Bags (SIR) and Other Vehicle/Passenger Safety Systems.
186 04/12/2022 Fluid Leak in the Center of Vehicle on Drivers Side, Tapping/Knocking Noise on Turns












206

10/30/2025

Information on Hesitation and/or Misfire Sensation When Passing Under High Voltage Transmission (Power) Lines - Multiple Intermittent ABS DTCs Set









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