My Tahoe will die if i put it in drive and gun it, i have to feather the throttle in order to keep her running. It'll idle just fine, if i snap the throttle real quick, it'll bog down, and never rev up, but if i put her to the floor with it in park, it'll bog down like it does, then rev up normal. once i get going in speed, i don't really notice anything wrong, any thoughts? its the early model vortec.

 

Check fuel pressure.

 

brand new fuel pump, and brand new distributor

 

I would still check the fuel pressure?

 

Especially if it's non-OEM.

 

fuel pressure is in spec, i think it was like 68 psi wile running.