"Married" meaning running new LS computer while retaining factory guages, ac/heat controls, 4wd, etc. I'm in the process of "marrying" my harness from a '00 camaro to my 1988 k1500 factory harness. Going ok so far. All i have left is fuel pump relay, and to somehow find which wires go to SES light in the cluster so i can hook the wires from the new computer to it.