Dealer replaced 7 fuel pumps in 7 years,they say intermittent problem unfound, on 2003 Cadillac Escalade ESV

Bought car at 40,000 miles,at 60,000 miles fuel pump replaced.there are 6 more replacements after that.Around 20,000 miles it cut off.They say the problem is intermittent and can't find it.So just replace pump and send me on my way.Only to come back with the same problem.I'm on highways alot and without no warning car cuts off just like that,leaving me stuff in the middle of traffic.This is a safety hazard.What is the problem before it's too late to fix.

Asked by for the 2003 Cadillac Escalade ESV
Sounds like the definition of crazy. Like they keep doing the same thing over and over again and expect different results. You need to find a shop in your area that is known for actually fixing cars.