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HOMESERVICE MANUALSGMC2024SIERRA 2500 HD DENALI ULTIMATEREPAIR AND DIAGNOSISGENERAL INFORMATIONRESET PROCEDURESPROGRAMMING AND SETUP - ALL SYSTEMSREPAIR INSTRUCTIONSB218L SIDE OBJECT SENSOR MODULE - LEFT: PROGRAMMING AND SETUPREPLACE AND PROGRAM ECU OR REPROGRAM ECU
2024 GMC Sierra 2500 HD Denali Ultimate

Replace and Program ECU or Reprogram ECU

2024 GMC Sierra 2500 HD Denali UltimateSECTION Replace and Program ECU or Reprogram ECU

To program a replacement or an existing ECU, perform the following procedure:

NOTE:
  • Due to continuous improvements, the on screen selections may vary from instructions below.
  • It is required to program both the B218L Side Object Sensor Module - Left and B218R Side Object Sensor Module - Right when a programming event is required.
  1. Access the Service Programming System (SPS) and follow the on-screen instructions.
  2. On the SPS Supported Controllers screen, select B218L Side Object Sensor Module - Left.
  3. On the SPS Select Function / Sequence screen, select Programming
  4. Clear DTCs.
  5. On the SPS Supported Controllers screen, select B218R Side Object Sensor Module - Right.
  6. On the SPS Select Function / Sequence screen, select Programming
  7. Clear DTCs.
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:

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