Justice7688
Newbie
I have the 95 k1500 with the 5.7Pressure s/b 10 - 13PSI. When you turn on the key with engine off (KOEO) the pump should run for about 2 seconds then shut off. While cranking it should run continuously. The TBI doesn't hold pressure after the pump shuts off (unlike a Vortec), your pressure should drop off almost immediately.
Edit: if you have a 7.4L your fuel pressure s/b 18 - 20 PSI, only 94 & 95 had the smaller injectors running on higher pressure.