2015 GMC Sierra 1500 electrical system problems

I was riding on the freeway and someone flagged me down and said you car is on fire. The fire was between the cab and the bed of the truck on 3/22/2017. On 4/11/2017 is began to smell of smoke whenever I crank. The smell is coming through the vents. Also the vehicle will not pass inspection because of the emissions for the past 4 months. I am paying a note on this vehicle monthly and am not able to use it. I can't get it inspected and the registration is out therefore I cannot drive it.

Tl* the contact owns a 2015 GMC sierra 1500. While braking or making a right turn while braking, the vehicle lost power. The failure occurred three times in traffic without warning. In addition, the stabilitrak warning indicator illuminated. The vehicle could not be driven. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure and did not assist. The failure mileage was 58,000. The VIN was unknown.