i got a poo93 code and a p0307 code po540 code p1781 code class 2 serial communication problem code 91000
yes i been taking it to palm chevy here across the street
they replaced the injectors less then 6000 miles ago but its been a year since they done it so they wont stand behind the repair they want to replace the injector pump the truck only has 98000 miles on it as it is
from what the manfacture told me thats all they can check is the fuel rail not the cp3 pump
P0093 "large fuel leak detected" INJECTORS! Could of been a poor install job, and dirt already wiped them out. Did they replace all 8? Some dealers only replace the bad ones
P0307 "Fault Cylinder C-Misfire Detected (CYL7)" I would check to make sure the wires are tight on top of the injector or the harness is plugged in good and tight.
P0540 "Manifold Intake Air Heater Circ" first make sure the Tech did not remove the wire and forget to put it back on. If that is not the case, you can take it out and check for continuity.
P1781 "Eng Torque Signal Circ" again might just be a loose wire, I am unsure where this one is located, think it takes it off the trans/Torque converter though.
Just cause it only has 98k on it does not mean the CP3 is not bad, but you are not throwing any codes to lead me to believe it is "P1093/P1094"
Heck I got one I am working on with the same amount of miles and it has a bad CP3
I would find a new dealer or shop to take it to to diagnose and then you have proof of poor service preformed by the first dealer.