My 2000 Grand Prix GT keeps stalling intermittently for no determined reason.

Cam and crank sensor, sensor wiring and grounds, on a GM these are critical, ignition module, basic engine tune condition. You might be money ahead if you can get the vehicle live data scanned, the only problem is if they can get it to do it while under tha scan.

The crankshaft sensor on these vehicles can be troublesome. An intermittent problem like this is usually electrical. Are you sure you don't have any stored codes? If the computer (PCM) loses the fuel enable signal the engine will stall. The service engine soon light will not remain on but a code will be stored in the computer. When you said you need to jump it to get it started after it stalls, is that because the battery is dead or because you cranked it excessively and killed the battery? If the battery is dead it's a charging system problem. After the alternator stops working, for whatever reason, the engine will continue to run off the battery until the battery is dead. Then the engine will stop because there's no electricity to power the ignition system, fuel pump, or PCM. Although a remote possibility is throttle body icing. If the problem happens in cool damp weather that could be what's going on. There's a small coolant passage, in the plastic upper intake manifold, that runs around base of the throttle body to prevent this from happening. If it's clogged, ice can build up on the throttle plate and stall the engine and prevent it from restarting until the ice melts. A faulty EGR (Exhaust Gas Recirculation) valve can cause this problem or a leaking EGR orifice in the plastic upper intake manifold. Another problematic area for these engines. Hope that helps! Jim

The car is 23 years old and unless you live in the hollywood hills it's got rust issues and you probably should move on , it ain't worth it