Engine Control Module Replacement

2016 GMC Sierra 3500 HD SLE, 4D Cab Chassis, 6.6L Eng VIN 8, 4WDSECTION Engine Control Module Replacement
WARNING: This page is about a different variant/trim than selected.
Fig 1: Engine Control Module
GM3621914Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary ProcedureΒ 
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (L96, LC8, LML)Battery Negative Cable Disconnection and Connection (L83, L86, LV1, LV3) .
1 Electronic Control Module
WARNING:

Refer to Safety Glasses Warning .

RENDER: 1.0x

NO RELATED

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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.