Trunk of suv slammed down on my head. No symptoms of concussion. Have bump on top of head, pain to touch, slight sore neck, back, knees. Should I see a dr?

Not if your ok. If your not having any severe head pain, dizziness, nausea, poor concentration or memory,change in personality, poor sleep you've not had a concussion and you will be fine. No need to see a Doctor.
Subgaleal hematoma. You likely have a subgaleal hematoma, a collection of blood under the muscles of the scalp and outside the skull. It can hurt as it caused the muscle layer to be torn from its attachment. Not a brain problem and should resolve reasonably quickly.