Yep
Should be there if factory wired. It's a 4 pin plug under the dash - mine was taped on the left side (on the right if laying on your back) of the steering column. The plug was white and had a Red, White, Blue and Black wire in it.
If you need the harness Draw-Tite (pn: 18261) has them and so does Tekonsha (pn: 3020 or 3020p).
BTW - Be careful with the colors - Mine did not match to the same function as those on the brake control.