The brake lights and cruise control have suddenly stopped working - see nthsa bulletin 06v139000. as evidence of a systemic problem with gmc canyon vehicles. was not even aware brake lights were out until i came across the nhtsa bulletin. additionally, the electronically activated 4 wheel drive has sporatically started trying to engage when the vehicle is first beginning to move from a dead stop. this started a month ago when i first noticed the cruise control would not work. discovered the brake lights were not coming on last night 12/16/16. checked bulbs and fuses and that is not the problem. believe there is an underlying issue likely related to nhtsa bulletin 06v139000.