My brake lights dont work and cruise control wont disengage with brake pedal. Changed the brake light switch under the dash already... any ideaa???

 

Have you chased any wiring? There are a couple large major wiring connectors under the truck body. Check to make sure they're not loose or corroded.

 

Could be clockspring if you are just throwing parts at it......brake light switch and clutch switch kill cruise IIRC.......can you kill it with Cancel button on wheel? Have you checked the bulbs? Trailer connector?