I think differently then most people I guess, i'd buy a truck with that many miles because it obviously is a good truck or else there wouldn't be that many miles on it. I vote keep the chevy, but thats just me. My Yukon has 310k on it and it ran like a dream, sold it within a day. My mom has a durango with 167k and its been in the shop 3 times for the tranny since new... but the choice is yours.