I have a 2002 chevy 3500 pickup originally equipt with a 8.1 gas engine with allison trans. . i just recently install a 2002 6.6 duramax with allison trans. . im getting the engine to turn but not fire over and run . .i primed the pump so i believe im getting fuel. .i used my stock interior harness and the engine harness from the duramax is there anything needed or that im missing that anyone is aware of? any help is greatly appriciated!! thanks