What's up, everybody?

I'm currently looking at a '99 GMC regular cab with a 5.3. It has 129k. Is there anything in particular that I should be looking for as far as problems? I understand the 5.3 to be a pretty stout little engine with a lot of life if treated right.

As far as mods the only thing I would do is get a nice cam and exhaust work done.

Any info would be greatly appreciated.