I'm not a professional, but in my 30+ years experience in the auto body industry, I feel confident it's totaled. Since the bumper is still in the correct position, I'm going to say the truck frame is probably okay. The entire bed will have to be replaced, and if the back glass is shattered from the bed cover, there's most likely damage to the rear of the cab. Low mileage will help preserve a small portion of the truck's value, but it's the years that chip away at the overall value of a vehicle... second only to high mileage. Once the repair cost reaches 70% (on average) of the average retail value, insurance companies will total the vehicle. If it's a liability claim and anyone was in the vehicle when the accident occurred, there may be some compensation for pain and suffering.
