Business ProfileforEwing Buick GMC

I purchased my 2022 GMC ******************* back in November from Ewing GMC in *****, **. I am a roofer, and my career depends on my vehicle. I live in *****, **, and was driving 80 mph back from *******, ** around 12 PM Friday 3/24/23, on the highway when a notification appeared on my dash saying I needed to press the "start" button. The truck completely shut off, making it difficult for me to pull to the side of the road safely. Once I had stopped, I put the truck in "park" and it was completely unresponsive and would not re-start. I had to wait over 5 hours for OnStar to get a tow truck and get my truck. It was eventually towed to ************************************ in ******* around 6:30 PM that evening. I live in *****, **, and had to fly back the following morning. ************** was not able to look at the truck until late Monday afternoon 3/27/23. The service manager in ******* said the engine appears to be seized up internally and they have suggested a complete engine replacement from corporate. It is now Wednesday 3/29/23. I am still without a loaner truck, as Ewing GMC here in ***** will not provide me with a loaner since the truck is not in service at that location. It is not my responsibility to get the defective truck back to GMC Ewing in *****, as the truck is still under full warranty. GMC corporate, Ewing GMC and ************************************ are not taking this situation with any urgency, and I am now responsible for paying for an $85,000 truck that does not run and GMC has not been cooperative in resolving the situation in a timely manner. I am at a loss as to what can be done and how I can proceed to get this resolved ASAP.