Hi, great forum. I recently bought at auction, 2 trucks that were from txdot's fleet. both with a little over 200000 miles, bi-fuel and covered with the red dust from lubbock tx. 2002 4wd, and 2004 2wd. drove the 02 around lubbock then parked it to come back later. Drove the 04 about 700 miles with no problems. Handles very lightly. i learned from this forum that they are "7700" models that have al sorts of heavy duty features. Im keeping one and selling the other. Ive already started to refurbish the one in my possession, such as removing the tanks for more space. txdot saw fit to stop using the lpg. going back for the other this next weekend. hope it gives me no problems too.