I had a 2002 ZR2 extended cabp/u with the 4.3 litre Vortec. I put 160k on it,and never did anything but brakes, and tires--oil chnages of course! I had a new 95 Toyota Tacoma 4wd extended cab and had to have the front end rebuilt, and a head gasket--with less than 20k!!! It was the first year of the new design, and , according to the dealer, the front end was a design flaw--the front end and the weight of the vehicle were not balanced, causing vibrations, and it would eat up the front tires in bout 7k miles as a result. To their credit, they gave me a full sized replacement vehicle, rebuilt the front end, added heavier springs, and even replaced a cassette player because it ate a tape! I had the replacement vehicle for 3 months, since the replacement parts weren't available yet, being a new model. When they were finished, they put a whole new set of tires on the truck, although the front ones were teh worn ones--and gave me the choice of tires!