I have a 2007 denali and the cruise control has not been working for some time, I decided to go buy a new one and replace it. after the swap the brake lights wont turn off. I can get under the dash and wiggle it and the tail lights will turn off. As soon I hit the peddle again the tail lights came on but wont go off again. I took the new one back off and took it back to the parts store and got a new one, same thing. I can put the old one on and the lights work as they should but no cruise control. Is there some kind of adjustment with these or has any one else had this problem?