also find out the build date if its pre July 99 then it has smaller turbo and smaller injector's then the post July 99 trucks. The don't produce as much power or tow as well. The 4r100 trans in those truck are very well known for blowing up between 160K-180K miles. If it hasn't been rebuilt already plan on a rebuild in the next year or so depending how much you drive and how much you tow. Best thing to save the life on them is to NEVER tow anything or pull a grade even empty in over drive it smokes the clutch's quick. Anytime you think you may have gotten the trans hot do a service and filter on it and it will save a lot of it's life span. If your going to tow get gauges if it doesn't have them already. You will want trans, boost and egt. You don't want it running hotter then 1250 egt's and make sure and install the egt gauge into the manifold not the down pipe on the exhaust it can be off as far as 250-400 degrees depending on the set up of the truck. If it's already in the down pipe move it to the drivers side bottom part of the manifold. If you have any question's you can ask me that's all I do all day is work on these trucks.
