2003 Jeep Cherokee has gone thru 4 fuel pumps in the last 6 year, any suggestions

Is the check engine light on, and did they check fuel pressure ?

does is crank but no start,and are you getting spark to thw start plugd

It sounds like a loose serpentine belt. Check the belt for cracking or frayed edges. It may need to be replaced or simply tightened.
If the sound is minimal or gone when the engine is idling, and you hear it whine when you step on the gas, then the belt is probably your issue.

You say the jeep won't crank-----do you just mean it won't start, but the engine does spin when cranking the starter motor? Have you had the trouble codes read from the ECU? Do you have spark at the plug wires? It could also be the crank sensor on your jeep that's bad.
If your ECU has gone bad, it won't send a signal to the fuel pump relay to turn on, so no fuel pressure. Just a few suggestions.

99% of all vehicles made for the last 30 years
have the fuel pump in the fuel tank.!!!!!

Obviously you have to remove the tank,to remove the pump

I would hope you know, that almost all fuel pumps have been in the fuel tank for the last 30 years.
Remove some of the fuel,drop the tank,the pump is on top.
You don't just put in a pump, assuming it is bad. Must perform one of several types of test, to determine if it has failed.

Recall DateMAR 04, 2004

Model Affected2004 JEEP GRAND CHEROKEE

DescriptionON CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH 4.0L ENGINES, THE CRANKSHAFT POSITION SENSOR WIRING INSULATION MAY CRACK AND EXPOSE THE WIRE.

ConsequenceIN THE PRESENCE OF MOISTURE, THIS COULD RESULT IN SENSOR MALFUNCTION, WHICH COULD CAUSE THE ENGINE TO STALL, INCREASING THE RISK OF A CRASH.

RemedyDEALERS WILL REPLACE THE CRANKSHAFT POSITION SENSOR. OWNER NOTIFICATION BEGAN ON MARCH 29, 2004. OWNERS SHOULD CONTACT DAIMLERCHRYSLER AT 1-800-853-1403.

Potential Units Affected14621

NotesDAIMLERCHRYSLER CORPORATION D13

Your on the right track, I would also verify battery voltage from the ignition switch.

sounds like either the sock on your fuel pump might be cloged or something more serius your cracnk shaft position sensor is gone. or the map sensor is not sending the right mixure of gas n air

Check the crank position sensor. I had the same problem in a 1989 cherokee 4.0, and the solution was simply to acomodate the sensor wiring. No replace was necesary