My truck quit cranking had it scanned and says crankshaft sensor replaced it scanned it again no code but still dont have fire from ignition coil or dis cap

Crankshaft position sensor,cam sensor . your vehicle should have coil on plug , a coil at each spark plug !
Ignition Coils
Each ignition coil has an ignition 1 feed and a ground. The PCM supplies an ignition control (IC) circuit. Each ignition coil contains a solid state driver module as its primary element. The powertrain control module (PCM) signals the coil driver to initiate a firing event by applying a signal to the IC circuit at the appropriate time. When the signal is removed, the coil fires the spark plug. The spark plugs are tipped with platinum for long wear and higher efficiency.
During normal operation the powertrain control module (PCM) controls all ignition functions. If either the crankshaft position (CKP) or camshaft position (CMP) sensor signal is lost, the engine will continue to run because the PCM will default to a limp home mode using the remaining sensor input. As mentioned above, each coil is internally protected against damage from excessive voltage. If one or more coils were to fail in this manner, a misfiring condition would result. Diagnostic trouble codes are available to accurately diagnose the ignition system with a scan tool.
If a crank sensor is replaced a Crankshaft Position System Variation Learn must be done and a scan tool is need to do this.

Could be a Crankshaft Position Sensor. Or the Throttle position sensor. Have you had the vehicle's error codes scanned?

What fault codes did you receive on the engine computer scan test.

do you hear your fuel pump kick on when you you turn the key?

did you check for fuel pressure at the fuel rail?
listen for the fuel pump when you turn the key on
did you change the wire harness when you changed the pump?

check for injector pulse if no pulse cam sensor is bad

replace the crankshaft position sensor, it will cure the problem.

if it died all of a sudden no warning, replace the ingition moduel located in the distrubitor. These are common to go out without warning and would cause no spark. It's like a $30 part and just simple tools needed to replace. If it went out over time let me know and I'll tell you what else to check.

what engine? 3.0L 2 Valve? 4 Valve?
3.4L SHO engine?

The PCM (engine computer) fires the coils, but it is never the cause of a problem. I suspect it is the crankshaft position sensor on the front of the engine by the crank pulley. easy to change.

Crankshaft Position Sensor The crankshaft position sensor (CKP sensor) (6C315) is a variable reluctance sensor triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft pulley and damper. The signal generated from the crankshaft position sensor is called the crankshaft position (CKP) signal, which provides base timing and crankshaft speed (rpm) information to the ignition control module (ICM) (12K072). Base timing is set at 10±2 degrees before top dead center (BTDC) AND IS NOT ADJUSTABLE. The powertrain control module (PCM) (12A650) will use this information with the spark advance information to determine ignition coil (12029) turn on or turn off time.

did you do a spark test?
This could be a number of things, your crankshaft sensor, coils or ignition module.
check the coils

1. Remove the ignition coil(s).
   
2. Using an ohmmeter, check the resistance between the primary terminals on the underside of the coil. The resistance should be 0.50-0.90 ohms.
   
3. Check the resistance between the secondary terminals. It should be 5,000-10,000 ohms.
   
4. If the coil failed either test, replace the coil.