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 H2FACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Switches
SWITCHES LOCATION
| Component | Location |
|---|---|
| A/C Low Pressure Switch | On right side of accumulator. See Figure . |
| Automatic Transmission Fluid Pressure Manual Valve Position Switch | In automatic transmission. |
| Brake Fluid Level Switch | On left side of brake fluid reservoir. |
| Coolant Level Switch | In coolant reservoir. See Figure . |
| Engine Oil Level Switch | On lower right side of oil pan. |
| Ignition Key Alarm Switch | On ignition key cylinder. |
| Malfunction Switch | At left side of steering column. |
| Park Brake Switch | Part of park brake assembly. |
| Park/Neutral Position Switch | On left side of transmission. |
| Stoplamp Switch | On top of brake pedal bracket. |
| Turn Signal/Multifunction Switch | On left side of steering assembly. |
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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