If your gonna do regular driving I don't see why you need cross drilled. I took off my rotors to have them machined and its easy. I would suggest getting the manual. My 2002 was a piece of cake. 2 bolts hold the caliper 24foot pound for torque. The caliper bracket had 2 bolts at 83 foot pounds for toque. You take them off and pull the rotor free. Then install in reverse. I don't know about the rotors on a '99 , but every vehicle I have had has never been that difficult. I say if he has tools and a jack, do it yourself. If you don't have a torque wrench, get one. You can use it for everything else on your truck. American cars are easy to work on.