In 2006, Natasha Weigel,18, of St. Croix County was sitting in the backseat of her friend's Chevrolet Cobalt when the car veered off the road and smashed into several trees.

Weigel and 15-year-old Amy Rademaker, who was in sitting in the front passenger seat, died.

After years of inaction, General Motors recalled the Chevrolet Cobalt and admitted the vehicle had a faulty ignition switch, which had the potential to shut off cars while they were on the road. Once shut off, power steering would not work and life-saving air bags were not deployed. The manufacturer identified at least 13 deaths tied to the problem.

That list included Rademaker, but not Weigel.

In an interview with NBC News, Weigel's parents expressed their outrage towards General Motors.

"Two girls in the same vehicle, they both died of injuries from that same accident but only one of them is counted. That's very frustrating," said Ken Rimer, step-father to Natasha Weigel.

Weigel's parents said the company did not take responsibility for the death of their daughter because she was sitting in the back, where there were no airbags.

"She died in [their] vehicle and if the power steering and the airbags and the power breaks would have worked, she could have had a chance to live," said Jayne Rimer, who lost her only child in the accident.

GM admitted in February that engineers first discovered the problem with the ignition switch as early as 2004. The company did not recall the 2.6 million affected cars until early this year.

"We want to know why nothing was done with it," said Ken Rimer.

Weigel's parents said they spoke to CEO Mary Barra about their daughter, detailing their Natasha's love of children, hockey and poetry.

"There were some tears," said Ken Rimer, describing Barra's reaction.

"Staged tears," added Natasha's mother.