My 2004 Suburban is burning fuel pumps. I have replaced four in the past two years. What could be causing this problem?

I had the same problem, different vehicles. Mine, the time between would get shorter and shorter. I started having trouble with everything electric, alternator, starter, battery. I never found the problem and it has sit up on the hill for the last 6 months. You need to scan the whole wiring circuit/harness of the fuel pump. To be honest, you need to have it put on a machine and scanned. You have an electrical issue somewhere. I know it is a hassle. I have been there. I didn't have that type of money. That is the best advice I can give you because they are hard to find. It will save you in the long run, as far as time and money goes.