How do you replace fuel pump in 1989 Chevy pick up?

To replace the fuel pump in a 1989 Chevy pickup, first, disconnect the negative battery terminal to ensure safety. Then, relieve the fuel system pressure by removing the fuel cap and using a fuel pressure gauge or by disconnecting the fuel line. Next, access the fuel pump by removing the fuel tank (if it's in-tank) or by locating it in the fuel line, depending on the model. Finally, install the new pump, reconnect the fuel lines, and reattach the battery before testing the system for leaks and proper operation.