How dependable have your trucks been? How reasonable has the parts or service been cost and time wise? I am thinking of getting a newer one - maybe used, but if gas it would be one with the newer type 6.0 Chevy V-8, not the older 350 Vortec - I have not heard much feedback on how dependable these trucks are. If I bought one with the Chevy powertrain I wouldn't be too worried as I could get parts and service at pretty much anywhere. But the diesel concerns me as I hear the parts and service on those are very pricey. One trend I noticed is alot of the used Isuzu's in the trader magazines around here, most advertise rebuilt engines or tranmissions on trucks with only 130-150 thousand miles on them.... Most late model normal pickup trucks go beyond that with just oil changes and I would have expected these Isuzus would go WAY beyond 200-250 thousand before major repairs. I started a thread asking for gas milage figures. If the diesel is not much better than the gas I would simply go with gas as I know it would be easier and cheaper to get it repaired if needed, but If the diesel does get way better mpg, then I would be tempted to go that route... Oh the joys of long term decision making !