So since getting the Power Wagon, I've admittedly not been driving her. Primary battery dead. Replaced both as they were from early '14. All I get still is just a click now. So my gut feel is solenoid. AFIAK it is the original starter. 200k. So... I really haven't done too much troubleshooting yet, just trying to get some ideas on what to look at. Thought about giving it a tap with the hammer...