The fuel pump on a 1990 GMC Safari passenger van is located in the fuel tank. To access the fuel pump, you will need to remove the fuel tank.
_Here are the steps on how to remove the fuel tank and access the fuel pump:_
1. Park the vehicle on a level surface and turn off the engine.
2. Engage the parking brake.
3. Disconnect the negative battery cable.
4. Locate the fuel tank under the vehicle.
5. Remove the bolts holding the fuel tank in place.
6. Carefully lower the fuel tank.
7. Disconnect the fuel lines and electrical connectors.
8. Remove the lock ring holding the fuel pump in place.
9. Lift the fuel pump out of the tank.
_Once you have removed the fuel pump, you can inspect it and replace it if necessary. Be sure to re-install the fuel pump and all the components you removed in the reverse order._
