2001 GMC C3500 HD 6.5 F, StandardFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: PCM Connectors
    GM26961Courtesy of GENERAL MOTORS CORP.
  1. Install the PCM mounting hardware.
  2. Install the connectors to the PCM.
  3. Install the PCM in the passenger compartment behind glove box.
  4. Install the negative battery cables.

    The malfunction indicator lamp (MIL), antilock and brake lamps will continue to be enabled until the PCM is programmed. Once the programming is complete, the lamps will turn OFF and normal operation will occur.

  5. Refer to Powertrain Control Module (PCM) ProgrammingΒ .
Factory Service Tools

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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.

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