Thanks for the diagrams, I had no idea they could be looked at. Now, i can locate the lever to the air cable. Can you tell me the function of the Air Cable? My truck has separate controls for the Heat and AC. There is also no AC under the hood. I'm almost certain the Temp and Defrost cable are the ones behind the glove box. Since the Heat and A/C are separate, do i need to hook up the air cable?