gmc Workshop Repair Guides

GMC G3500 1 Ton Van V8-350 57L VIN L - Workshop Manuals

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Firing Order > < Engine, A/T - Shift/Driveability Concerns/MIL ON|Page 1730

Fuel Pressure Release & Fuel Filter Service for G 3500 V8-350 57L (1985)

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Fuel Pressure Release: Service and Repair

Throttle Body Injected Engines

1. Remove fuel pump fuse from fuse box.
2. Start engine and allow to run until supply of fuel in pipes is depleted.
3. Crank engine an additional 3 seconds to ensure relief of any additional fuel pressure.
4. Turn ignition Off and replace fuel pump fuse.

Port Injected Engines

1. Disconnect fuel tank harness connector.
2. Start engine and allow to run until supply of fuel in pipes is depleted.
3. Crank engine an additional 3 seconds to ensure relief of any additional fuel pressure.
4. Turn ignition Off and reconnect fuel tank harness connector.

Firing Order > < Engine, A/T - Shift/Driveability Concerns/MIL ON|Page 1730