Trailblazer limp mode problem

I have a 2003 chevy trailblazer ls 4.2I. I replaced
the A/C relay and the A/C worked after that
however; after I started the vehicle a little later, it
started in what I understand to be limp mode.  The
throttle body will not open when it's running but will
with ac only on. I'm getting codes p1340 and
p1345 which are cam sensor bank 1 and cam
sensor correlation. I have tested AND replaced the
cam position sensor, throttle body, crank position
sensor, map, maf, vvt solenoid, and pedal position
sensor. I have checked and rested all fuses and
relays. I have traced wiring and completed a
compression test on all 6 with good results. My
engine and trans both have 80k miles. Any actual
solI'd ideas that can be conducted on my own
would be helpful. Thanks.