How do i replace fuel pump on 1996 suburban?

You have to remove the fuel tank(Make sure to disconnect the battery first). When the fuel tank is out, there is a locking ring that has to be turn counter-clockwise and will usually need a little force to pop it loose. Avoid using a steel screwdriver and hammer as you could cause a spark on the fuel tank which could then explode. Use brass or wood and a hammer to tap the ring out. Then you have to carefully remove the sending unit, pay close attention to how its coming out as it won't be very easy and you could damage the float. If it has the kind of sending unit where the pump can be replaced, you have to remove the connections from the pump, remove the filter screen and pull it out of the fuel line. Otherwise you have to replace the fuel pump and sending unit as one piece. Then basically do the steps in reverse. Be careful when you put the sending unit back in as you don't want to damage the float or pump or anything.