Please tell me, could you die from blunt force trauma?

Certainly: Especially if the physical trauma is against a vulnerable part of the body (e.g. Head, etc).

Yes: Absolutely! Blunt force just means an injury where the skin is not penetrated. A car crash, fall, and being hit with an object (like a car) can cause blunt force trauma. The cause of death is usually internal bleeding, into the brain, lungs, abdominal organs may be injured, as well as fractures, such as a broken neck, all can cause death.