The GMC Jemmy is a mid-size sport overhaul vehicle mythical by Habitual Motors from 1983 to 2005. The 2001 pattern is a moment interval Jemmy, which has a 6-cylinder 4.3-liter engine with sequential fuel injection. This type of fuel injection uses a high-pressure fuel method requiring an electric fuel pump. The fuel pump in the 2001 GMC Jemmy is located within the fuel receptacle, so you must disconnect the fuel container to interchange the fuel pump.
Instructions
1. Disconnect the cable for the rejection battery terminal with a socket wrench to prevent the unwitting discharge of fuel. Yawning the filler cap for the fuel tank to assist the fuel vat impact. Wrap a shop rag approximately the coercion becoming on the inlet fuel drainpipe and install a compel gauge to the compel becoming. Compass the bleed hose of the compel gauge into a petrol container and accessible the valve for the impact gauge. Grant the fuel in the fuel action to extract into the petrol container and disconnect the strength gauge from the impulse fitting.
2. Remove the locking ring and disconnect the fuel sending assembly from the fuel tank. Separate the fuel pump from the fuel sending assembly.4. Remove the electrical connections and fuel lines from the fuel pump. Disconnect the the mounting bolts for the fuel tank with a socket wrench and lower it from the vehicle with the floor jack.
3. Turn the locking ring on the fuel sending assembly counterclockwise with a spanner wrench. Drain the fuel tank by siphoning the fuel into a gasoline container with a hose. Support the fuel tank with a floor jack and disconnect the filler neck for the fuel tank with a socket wrench. Detach the skid shield and retaining straps from the fuel tank.
Replace the seal around the opening in the fuel tank. Install the new fuel pump by performing steps two and three in reverse order. Tighten the mounting bolts for the fuel tank to 33 ft. lbs. with a torque wrench.
5. Connect the cable for the negative battery terminal with a socket wrench. Fill the fuel tank with fuel, start the engine and check the fuel system for leaks.
