I have a GMC and I have replaced all the sensors

I'd get a can of easy start or equivalent and see if it runs then, if so and u say u got fuel pressure it can only be a couple of things really 1 crank position sensor cam position sensor rail pressure sensor if it has 1 or ecu fault

look into throttle body while cranking.see if you see fuel spray.if not, low fuel pressure of pluged fuel filter. also coolant temp or tps sensor could be at fault.have vehicle sensors scan tested for values..

starting definately has a lot to do with the crank/cam position sensors, but it wouldnt have nothing to do with hot or cold weather, oxygen sensor will make the vehicle run too rich if its out, you will smell fuel very strong out the exhaust, that could make it run sluggish also, and usually if the mass air flow sensor goes out the vehicle wont start at all...

Return it ASAP to whomever did the trans work. You paid for it,

The throttle position sensor is located on the throttle body. Which is in the front of the intake manifold.

Do you still have fuel pump pressure?Is there fuel getting to the cylinders?If all the fuses are good,then replace the crankshaft sensor.

It could be the CPS, but as you now know throwing parts at a repair is costly and sometimes it does not fix anything. A code scanner should be able to tell you if the sensor is bad. If the CPS goes bad you will have no spark.

Doesnt this engine use a crank position sensor? mounted on timing chain cover.I would check that first

could be in the crank position sensor

just a thought shack

The Throttle Position Sensor is a potertionmeter, and is connected to the throttle shaft on the throttle body it self. The best way to notice it, is the wire harness coming from the Throttle body on one side where the shaft is.

Good luck and hope this help.