How do you get the fuel line clips off the fuel pump on a Chevy 1998 2500?

There is an inexpensive tool they sell in auto stores that will help you with that. It slips in and releases the retaining clips, so the lines can be removed. Be careful the line is under pressure and will squirt a small amount of fuel out of it until pressure drops a rag will catch it well then dry the rag out by lying in out flat until dry as a gas soaked rag in a ball can be combustive.