1999 Tahoe hesitates and misfires when throttle is between 1/4 & 1

[autoguts]

I recently replaced the cap, rotor, spark plugs, and crankshaft position sensor on my 1999 tahoe (police) and it runs great! But... when I'm driving up slight inclines giving it about 1/4 to 1/3 acceleration, it starts to misfire and run really rough. It goes away immediately if i gas it and it downshifts,or if i let off the gas a little.. does anybody have any advice on how to fix it? Its a 5.7 4x4. I didn't reset any codes or anything when i changed the crank position sensor and i don't have any check engine lighht on (even when it misfires).

[gmtech4]

wires?,

 

fuel pressure is ?