This all started 3 weeks ago when the car just died and wouldn't restart. It turns over, just won't start. I've replaced the crank position sensor since it had been throwing a code for it, still won't start. Determined that it'* not getting any fuel. Replaced the fuel filter, pressure regulator, fuel pump relay, and finally the fuel pump. I've checked all related fuses, and it'* still not getting any fuel. When I turn on the ignition, I don't hear the pump run.
Other than the new fuel pump possible being faulty, is there any thing else that could be causing this that I've missed? Thanks!!

Sometime between 2000 and 2003, GM switched away from a 2 speed fuel pump. Check in the trunk, in the right rear compartment area and see if you have a fuel pump control unit. It should look like this.

If you do, that could be the problem.