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: Switches
SWITCHES LOCATION
| Component | Location |
|---|---|
| Automatic Transmission Fluid Pressure (TFP) Manual Valve Position Switch | In automatic transmission. See Figure. |
| Backup Lamp Switch | On top of transmission. See Figure. |
| Brake Fluid Level Switch | On left side of brake fluid reservoir. See Figure. |
| Clutch Release Switch | At top of clutch pedal assembly. See Figure. |
| Clutch Start Switch | At top of clutch pedal assembly. See Figure. |
| Door Ajar Switch - Driver | In lower left "B" pillar. See Figure. |
| Door Ajar Switch - LR | In lower left "C" pillar. See Figure. |
| Door Ajar Switch - Passenger | In lower right "B" pillar. See Figure. |
| Door Ajar Switch - RR | In lower right "C" pillar. See Figure. |
| Endgate Ajar Switch | In right "D" pillar. See Figure. |
| Engine Oil Pressure (EOP) Switch | Above oil filter. See Figure. |
| Ignition Switch | Bottom center of steering column. See Figure. |
| Park Brake Switch | Left lower side of dash. See Figure. |
| Park/Neutral Position (PNP) Switch | Left side of automatic transmission. See Figure. |
| Stop Lamp Switch | Above brake pedal assembly. See Figure. |
| TCC Brake/Cruise Release Switch | Top of brake pedal assembly. See Figure. |
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.
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