Fule pump relay overheating
 

hello, just wandering if anyone else might have an idea as to whats wrong with my truck. its a 97 chevy silverado 4x4 350 automatic. its got 194,00 miles and ive had to fuel pump replaced twice in the last 3 years. the latest is about 3 months old. the problem is the fule pump relay keeps over heating and causing the truck to shut off. i have a fuel psi guage on it and i can see it drop to about 40 psi and it wont run. i bought a new relay and stuck it in there and it worked good for about a month then started up again. when its working the psi is 60-63. any clues as whats going on?

thanks in advance, j