Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Driver Door Module
SCAN TOOL DATA DEFINITIONS
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.
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
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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.