You're lucky that the dealership is repairing your underhood wiring.
Be sure that they replace EVERY harness that has insulation cracking on it.
I replaced all 4 harneses myself. It was a royal PITA.
As for the injectors...you can buy the seals from the dealership. Like stated above, there is a concave rubber seal that goes b/t the injector and the LIM. There is also a small rubber washer that goes around the end of the injector. Replace both of these. Use a lot of patience when doing this as you can damage the injector if you aren't careful.
PM me is you need more info.
