2003 Hummer H2FACTORY OEM SERVICE PROCEDURE

Driver Door Module

Heated Seat Switch

The scan tool displays Active or Inactive. When the heated seat cushion switch is pressed the scan tool displays Active.

Heat Indicator Low

The scan tool displays On or Off. The scan tool displays the current status of the low heat operating mode determined by the heated seat switch signal circuit inputs to the driver door module.

Heat Indicator Medium

The scan tool displays On or Off. The scan tool displays the current status of the medium heat operating mode determined by the heated seat switch signal circuit inputs to the driver door module.

Heat Indicator High

The scan tool displays On or Off. The scan tool displays the current status of the high heat operating mode determined by the heated seat switch signal circuit inputs to the driver door module.

Back Only Heat Indicator

The scan tool displays On or Off. The scan tool displays the current status of the heated seat back only operating mode determined by the heated seat switch signal circuit inputs to the driver door module.

Back Only Heat Switch

The scan tool displays Active or Inactive. When the heated seat back switch is pressed the scan tool displays Active.

Memory Switch

The scan tool displays Memory 1, Memory 2, Both, or Idle. The scan tool displays the current memory switch status determined by the memory 1 and memory 2 signal circuit inputs to the driver door module.

Heat Indicator Low

The scan tool displays On or Off. Whenever the low heat indicator is commanded on by the driver door module the scan tool displays On.

Heat Indicator Medium

The scan tool displays On or Off. Whenever the medium heat indicator is commanded on by the driver door module the scan tool displays On.

Heat Indicator High

The scan tool displays On or Off. Whenever the high heat indicator is commanded on by the driver door module the scan tool displays On.

Back Only Heat Indicator

The scan tool displays On or Off. Whenever the heated seat back only indicator is commanded on by the driver door module the scan tool displays On.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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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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