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.
2007 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Connectors
CONNECTORS LOCATION
| Component | Location |
|---|---|
| C101 (Black, 6 Pin) | Rear center of engine. See Figure. |
| C115 (Black, 16 Pin) | Right of left front fog lamp. See Figure. |
| C116 (Black, 8 Pin) | Behind left headlamp assembly. See Figure. |
| C117 (Black, 8 Pin) | Behind right headlamp assembly. See Figure. |
| C125 (Black, 16 Pin) | Near battery. See Figure. |
| C130 (Black, 2 Pin) | In body harness to battery cable harness. See Figure. |
| C150 (Black, 16 Pin) | Behind battery next to EBCM. See Figure. |
| C155 (Black, 4 Pin) | Next to EBCM. See Figure. |
| C200 (Black, 40 Pin) | Behind left of dash. See Figure. |
| C201 (Light Gray, 22 Pin) | Base of steering column. See Figure. |
| C203 (White, 8 Pin) | Near blower motor. See Figure. |
| C204 (Light Gray, 22 Pin) | Behind right kick panel. See Figure. |
| C205 (White, 12 Pin) | Near blower motor. See Figure. |
| C207 (White, 12 Pin) | Behind left of dash. See Figure. |
| C208 (Yellow, 4 Pin) | Behind left of dash. See Figure. |
| C275 (Yellow, 4 Pin) | Next to C201. See Figure. |
| C307 (White, 8 Pin) | Under driver seat. See Figure. |
| C308 (White, 4 Pin) | In body harness to driver seat belt switch jumper harness. See Figure. |
| C315 (White, 12 Pin) | Under passenger seat. See Figure. |
| C318 (Black, 4 Pin) | In passenger seat bottom. See Figure. |
| C319 (Black, 4 Pin) | In driver seat bottom. |
| C320 (w/o Seat Heater) (White, 4 Pin) | In body harness to passenger seat belt switch jumper harness. See Figure. |
| C320 (w/Seat Heater) (White, 8 Pin) | In body harness to passenger seat belt switch jumper harness. See Figure. |
| C330 (White, 8 Pin) | Behind upper left A-pillar trim panel. See Figure. |
| C335 (White, 6 Pin) | Behind upper left A-pillar trim panel. See Figure. |
| C350 (White, 6 Pin) | Behind right lower A-pillar trim. See Figure. |
| C370 (White, 12 Pin) | In left rear passenger door. See Figure. |
| C380 (White, 12 Pin) | In right rear passenger door. See Figure. |
| C410 (Black, 4 Pin) | Behind right rear quarter trim panel near D-pillar. See Figure. |
| C420 (w/Heavy Duty harness) (Black, 16 Pin) | Rearward of left wheel well. |
| C420 (w/o Heavy Duty Harness) (Black, 4 Pin) | Rearward of left wheel well. |
| C430 (White, 4 Pin) | Behind left rear quarter trim panel near D-pillar. See Figure. |
| C450 (White, 12 Pin) | Behind left rear quarter trim panel near D-pillar. See Figure. |
| C500 (White, 30 Pin) | In driver door. See Figure. |
| C510 (White, 8 Pin) | Inside middle front of drivers door, near A-pillar. See Figure. |
| C600 (White, 30 Pin) | Body harness to passenger door harness, in passenger door. See Figure. |
| C901 (White, 12 Pin) | Left middle of end gate, near pass-through. See Figure. |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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