Installation Procedure

2024 GMC Sierra 2500 HD Denali UltimateSECTION Installation Procedure
  1. GM5027139Courtesy of GENERAL MOTORS COMPANY

    Serial Data Gateway Module (1) - Install

  2. Secure the retaining tabs.
  3. Connect the electrical connectors.
  4. GM5023517Courtesy of GENERAL MOTORS COMPANY

    Communication Interface Module (1) - Install

  5. Secure the retaining tabs.
  6. GM5002006Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Upon installing the floor duct to the side of the HVAC case, it is necessary to verify duct opening is completely installed, surrounding the HVAC case outlet port. Failure to do so could result in the duct falling downward, with the potential to interfere with driver's legs and gas/brake pedal operation.

    Floor Front Air Outlet Duct - Left Side (1) - Install

  7. GM5002004Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Floor Front Air Outlet Duct Bolt (1) - Install and tighten - Fastener Specifications

  8. Perform the necessary programming and setup procedure: Control Module References
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.