My 2000 gmc Sierra developed electrical issues. First the clock started blinking, then the odometer started the same thing. Now when I hit the brake pedal these both dim along with the dash lights as if the headlights are on. Along with the brake lights, the front yellow lights come on. And when the headlights are on, the right blinker doesn't work. (it does work when headlights are not on). What happened - this all in 1 day.
