I'm not sure if I ever saw this part or is it not used on the Extended Cab Truck? The manual shows the "cab to rear" aluminum. But this is showing the regular cab.

Cab rear aluminum.PNG

The angles of the chassis are different on the extended cab at the point where the cab and bed meet. I also am not sure where on the inventory sheets this part falls. So it is difficult to tell if it ever got inventoried.
There is no inventory sheet for the: cab, chassis, truck bed, etc. Just not sure. As I have said in the past, if there is not an inventory sheet, how do we know it is missing?

Funny thing too, this part looks like it goes under the cab, but the manual shows the cab going on, then this part.

Thanks