I'm no expert but i believe when you have your vehicle stopped with your foot on the brake for ten seconds or so the AHC will lower to allow easier egress.
Freshened up fluids under the hood. Brake, AHC, Radiator, Power steering. Then poured a bottle in of my favorite fuel injector cleaner Red Line/ topped off with super and drove into the City for a Hamburger. Yes, it was a tasty burger.
Truck looks like it has 245mi on it. The sellers should've made it more realistic. At this point i'd be taking it to a body shop to make sure it's road worthy. OP, do you guys have salvage titles there?