also I kept my original harness complete. I just rolled up extra tails of wire and connectors neatly and hid them under engine or or frame etc. two things by doing this. I was able to add stuff I later wanted like AC and some other electrical items. I provided extra wire. And I didn't have to worry about cutting a wire I should not have or messed up a connector taking it on and off. ok that is 3. plus GM spent a lot of money on engineers designing it lol
