2003 Jeep Grand Cherokee Stalling

Need a whole lot more information than that. Does the engine stall at stop signs because of low idle speed, or while you're driving at a steady speed? Can it be restarted right away? Do you get the nice "idle flare-up" to 1500 rpm at start-up? What led to the fuel pump diagnosis? Has the Check Engine light turned on just before the stalling occurred? Have you checked the diagnostic fault codes? Most importantly, was the battery recently disconnected or run dead? How long will the engine run before it stalls?

When you ask an engine-related question, we need to know the engine size.