Back in the Fall of 2009, I replaced my fuel pump on my daughter's 98 Suburban with a new AC Delco MU1748. It had symptoms of deliverying pressures around 47-48 psi and basically got so it wouldn't start at all. Went thru the ignition system, FPR, and finally narrowed it down to the fuel pump. Mr. Shorty on this forum was a great help. Now the truck is starting to act up once again. Mostly on cold starts. Warm starts are generally OK. I measured the fuel pressure at the intake and it is about 58 psi. I recall hearing that 60-66 psi is typical range, so I guess the course of action is to make sure the FPR isn't bad (by squeezing on the return line while activating the pump)? I did get the intake manifold gasket replaced last Summer and wish i had done the FPR while in there.