Thanks to others and especially Steve St. Laurent, I discovered the 1/2 in square hole in the tensioner that receives a 1/2 drive ratchet. I chose to do this from underneath instead of from the top. One can insert the 1/2 in ratchet drive, use it as a cantilever, and unload the serp belt to slip it off. The biggest hassle is working the belt around the tensioner pulley, you must remove the belt from all other components including working it around the front of the fan, so that you can position the belt athwartship (flat against the engine block) and work it free. I had to convince the dealer (this was a warantee job, 4k miles) that it was in his best interest to compensate me for the belt (they objected because I took it off) or I would make them come to my house and tow the truck; as much as I would have hated that. For those that don't know the beginning of the story, CT had snow this am; the thought of some kid towing my expensive truck in the snow did not appeal to me at all so I took the risk of changing the belt knowing that the dealer might reject compensating me for a job they couldn't document. I might be pulling my hair out tomorrow when I re-route this 7-8 ft belt. Thanks to TDR for the help.