Newbie question in regards to the 90k & 100k service.

Hello,

I've been trying to find some solid information on what the 90,000 and 100,000 services actually include. From what I've read, the 90k replaces the timing belt. But when I bought my truck, I think around 80k, the previous owner had already done that for me. Now my question is.. what else do those services include? I'm not too mechanically savvy, but I think I would rather try to do the work my self than shell out an arm and a leg just for some mechanic to "check out" some stuff. (That I could easily check out with the DIY guides on this website.)

Anyways, I appreciate the help ahead of time. And if you must flame me for "not searching" than go ahead and do so. But I'm just trying to cut-corners here. Because I couldn't find exactly what I was looking for in the search box. And it would take like 2 minutes for Yota' guru to answer this.


Thanks