Question about 1999 GMC Jimmy

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There is no gas getting to the engine but there is gas getting past the filter

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Turn the key to the 'On' position, but don't start the vehicle.

Do you hear a whirring noise coming from behind, or underneath you? If you do, then the fuel pump is working, or should be. There should be a whirring noise for a few seconds when you do this.

The way the fuel system works on this vehicle is that when you turn the key to the 'On' position, it should start pumping fuel to the engine. But it is not pumping the fuel directly into the engine, it is just pumping enough fuel to generate pressure in the fuel lines. The fuel comes back to the gas tank from the engine due to that pressure.

I would recommend that you get a Haynes Manual #24071 for your vehicle and look up the section on the Fuel Line. There is a way to test the pressure without removing the hoses/pipes which go to the engine.

Hope this helps.

Posted on Nov 07, 2010

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