Another who found ac-delco auto trak II at oreilly's for nine bucks a quart. They had it on hand.
After reading through pages of threads here on the forums, out of general curiosity, I noticed the repeated warning of transfer case neglect. I poked my head under the driver's side to locate the TC and my stomach dropped. Oil was dripping down all around the TC. The pessimist I am, I thought for sure a seal was shot, so I lifted up the truck and climbed under. As soon as get a good look at fill plug, it is clear that is where the leak is. The plug was loose enough to unscrew by hand. I used the generic red hand pump from harbor freight to fill the transfer case fluid and it worked ok, should have tried autozone for that oil gun posted above and in may03lt's videos.
I had taken my truck to a grease monkey oil change shop, used to be lube pros, for an oil change and without notifying me they checked my differential and transfer case. Apparently they're not good at tightening bolts. I guess that is what you get for using a coupon for $10 off, instead of taking the whopping thirty minutes out of my day to do it myself.