Yes, the truck glut for the .5 ton is in full swing here in the DFW area. 426 .5 tons and 45 ZR2's at my dealer alone. They only have 88 2500's and 3 ZR2's right now. Eventually the HD's production will catch up and the value will drop for those as well.56k was the highest I could find. Everyone was 50-56k. Didn't really surprise me because all the dealers are selling 1/2 ton at supplier pricing for everyone and GM had a large rebate or special financing on left over 23s. Pretty sure that's what caused the sudden dip on black book value.
I had to wait for 3 months until my Dealer would let me use my Supplier Price for my 2500 ZR2. Now no problem. The truck market is going to continue to get softer as the supply once again catches up and has in fact caught up for the most part in the .5 ton market.