Fuel Pump Probs

[ROCK]

working on a 97 suburban 5.7 vortec. fuel pump when out so i dropped the tank (which was full by the way) and replaced the pump. the pump that was in there was put in 4 months ago (not by me). anyways i put the new pump in and fired it up. it idled for about a half hour and then quit. truck dont start and cant hear pump run when i put the key to ON position. i jumped the relay and it still didnt turn on. when i removed the old pump, it had no continuity. the one i put in it had 0 ohms resistance. i dropped the tank today and pulled the new pump back out and it now has about 1.5 ohms resistance. the 2 wire harness that plugs into the pump has 11-15 volts when the key gets turned to ON position. Im not sure where to go from here or where/what to test. Im thinking there might be something burning these pumps out. Thanks, ROCK



PS i took the old pump back to parts plus since it was still under warrenty. they gave me a different one for free because they quit selling the first one cuz it had problems all the time according to them. thanks.

[old school truck dude]

If you didnt change the filter, it would sure be a good idea. If its even just partially clogged, it will make the pump work extra hard to push the fuel through and it will fail prematurely.