Other Fuel System Fuel Injection System problems of the 2015 GMC Sierra 1500

Within 46 hours of purchasing this brand new truck had 19 miles at purchase) it broke down on me and my kids. We had stopped at a stop light, pulled away and made a left hand turn once the light turned green. We all heard a weird noise come from the rear end of the truck. The traction light came on, the check engine light came on and the truck started running very rough with no acceleration power. I was able to pull into a parking lot. The traction light went off but the check engine light remained on. I turned the truck of and on again. Still ran very rough, stuttering on acceleration and stalled. . . . All with the check engine light still on. Call gm roadside assistance. They got a tow out to pick up the truck in 2 hours. It was returned back to the dealership where I bought it. Two days later they felt that it was the fuel injection system and replace the parts. They called again to let me know that even with the repairs the truck is still running rough but no longer stalling. They were unsure what will need to be done to repair it but would get back to me. Now we're at 12 days, still no repair, still no repaired "new" truck.