2015 buick enclave all service and oil changes done per schedule. No problems at all with the vehicle until the other day. Drove 10 miles on interstate with no issues - no warning lights, messages, smells, sounds, vibrations, and temperature reading was normal. After 15 minutes got back in the car and left the parking lot, as I pulled out onto the highway the car began to stutter like it wasn't getting enough fuel. I noticed the service stabillitrack message followed by a traction control message, then a reduced power mode message and then engine light. I pulled of to the side of the road and came to a stop. Then the engine stalled. I waited a few minutes and tried to start the engine but it would not start and barely turn over. Then I got a battery low, start engine message. Checked the oil and it was fine. There was no smells or fluids leaking. This is a well maintained 2015 enclave with 130,000 miles with no previous issues. The battery is the original but never had an issue with it. Had car towed to dealership and was informed the next day that the engine had seized up. The evaluation from the mechanic stated that the starter only clicked when he attempted to start. And that he was unable to turn the crankshaft balancer manually due to major internal issues. Recommended engine replacement at a cost of $9,000. Fault codes were P0068, P0300, P0101, P0106, and P0513. This is the evaluation I received at a cost of $146.00. Although the vehicle is in great shape inside and out, we are reluctant to spend $9,000 for the engine replacement. And are leaning toward selling "as is" and looking for a more reliable manufacturer. My question is whether it would be prudent to pay for additional evaluation. The mechanic stated that he is unable to determine the actual failure point without removal of oil pan and cylinder head. Is it worth paying for further evaluation?