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.
2004 Hummer H2 4D Utility PickupFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Grounds
GROUNDS LOCATION
| Component | Location |
|---|---|
| Fuel Tank Filler Ground | At left rear frame body mount. See Figure . |
| G100 | At left side of engine compartment. See Figure . |
| G100-Forward Lamp Harness | On left front frame body mount. See Figure . |
| G100-Negative Battery Cable | On left front frame body mount. See Figure . |
| G102-Engine Harness Ground | At left front side of engine block. See Figure . |
| G102-Negative Battery Cable | At left front side of engine block. See Figure . |
| G103 | At top right rear of engine. See Figure . |
| G103-Engine Harness Ground | At top right rear of engine. See Figure . |
| G104 | At top left rear of engine. See Figure . |
| G105-Engine Harness Ground | At lower left side of engine. See Figure . |
| G105-Negative Battery Cable | At lower left side of engine. See Figure . |
| G106 | At right rear of engine compartment, on forward dash panel. See Figure . |
| G200 | On left side of dash, near left kick panel. See Figure . |
| G203 | At lower right side of dash, near right kick panel. See Figure . |
| G300 | On left side body mount, in front of driver door. See Figure . |
| G302 | At left inner center "B" pillar. See Figure . |
| G304 | Under passenger seat. See Figure . |
| G306 | At right inner center "B" pillar. See Figure . |
| G308 | At right frame body mount, near right rear door. See Figure . |
| G310 | At left body mount. See Figure . |
| G401 | At left rear frame body mount. See Figure . |
| G402 | Attached to front of air suspension mounting bracket. See Figure . |
| G405 | At right rear frame body mount. See Figure . |
| G410 | On right rear inner side body panel. 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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