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.
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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCOMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORGROUNDS
1999 GMC Forward Control 5.7 R, Automatic
Electrical Component Locator: Grounds
1999 GMC Forward Control 5.7 R, AutomaticSECTION Grounds
GROUNDS
| Component | Component Location |
|---|---|
| G101 | Body builder installed. |
| G102 (Commercial Van) | Body builder installed. |
| G102 (Motor Home) (4.3L VIN W) | At rear of left cylinder head. |
| G102 (Motor Home) (5.7L VIN R) | At rear of left cylinder head. |
| G102 (Motor Home) (6.5L VIN F) | Near generator bracket. |
| G102 (Motor Home) (6.5L VIN Y) | Near generator bracket. |
| G103 | At rear of right cylinder bank. |
| G104 | At rear of right cylinder head. |
| G105 | At rear of right cylinder head. |
| G106 (Commercial Van) | Braided strap, at left rear of engine. |
| G106 (Motor Home) | At rear of left cylinder head. |
| G107 | Front frame crossmember. |
| G108 (Commercial Van) | On top of thermostat housing. |
| G108 (Motor Home) (A/T) | At rear of left cylinder head. |
| G108 (Motor Home) (M/T) | On top of thermostat housing. |
| G110 (Commercial Van) | On left frame rail, above steering gearbox. |
| G110 (Motor Home) | Above steering gearbox. |
| G200 (Commercial Van) | On top of steering column support plate. |
| G200 (Motor Home) | On top of thermostat housing. |
| G350 | At right frame rail, behind transmission. |
| G400 | At left frame rail, in front of fuel tank. |
| G401 | Body builder installed. |
| G402 | Body builder installed. |
RENDER: 1.0x
NO RELATED
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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.