This video shows you some tips on how to cut and connect extension wires into a pre-made harness. If you need special connectors that don't reach, try this
New Wiper Blade from 1AAuto.com How to repair, install, fix, change or replace a broken, bent, damaged, failing or squeaking windshield wiper transmission on 94, 95, 96, 97, 98, 99, Chevy Tahoe or Suburban; or GMC Yukon