1999 Chevy Suburban fuel pump problem

1999 Chevy Suburban V8 Four Wheel Drive Automatic

my 99 suburban is on its 4th fuel pump it starts up and runs fine untill you go about 50 mph then it starts sputering and wont go over 20 miles an hour I had a fuel pressure test done on it and was fine at idol but under a load it had low fuel pressure so yesterday I put its 4th fuel pump in it and it fixed the problem for about a day and then it started sputering and loosing power again I have heard that I might have a bad ground on the fuel pump what does this sound like to you