2011 Silverado 1500 LTZ P0300 Misfire code

Check engine light came on while passing a vehicle, Stabilitrak flashing, got
it home, and it had a P0306 code, so Ive replaced plugs, wires , coil on #6
cylinder, all (8) injectors,throttle position sensor, battery, cleaned mass air
flow sensor, cleaned MAP sensor, checked compression(130psi) Checked
fuel pressure(58psi)  Very rough idle, a few weeks before this code came up,
I would start by remote start, after a few minutes it would cut off, a few times
It stalled on me while slowing down at a redlight, but restarted with no
problem, I also noticed when I would start it up , and begin to pull out of
work, and it would act like I had the accelerator pushed, and I would have to
get on the brakes hard and fast, any help would be greatly appreciated.