Technical Bulletins

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.
  • Select a Year

  • Show All Bulletins

File

Number

Date Posted

Description


186

04/12/2022

Fluid Leak in the Center of Vehicle on Drivers Side, Tapping/Knocking Noise on Turns - Cut-away Vans


185

04/08/2022

Information on modifying the frame/wheelbase length on MD Trucks


184

02/15/2022

Park Status Signal 2019 and beyond MD Trucks


183

11/01/2021

First responder installed equipment disables or shuts down when the LH doors of the vehicle are opened, or the Start/Stop button is pressed. 2021 - beyond Tahoe PPV/SSV

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