alarm sound wont go off lights are off truck is shut off

does it have an alarm

no

Dinging sound inside van? If so try lubricating ignition switch where key slides in and out. It might still think the key is in ignition when it's actually out.

Battery is dying man if it stays on while your driving. Just happened to me. Left lights on and got her jumped 10mins later she stalled. Changed alternator and fuel filter still nadda. Changed battery Whammo. Good to go. Brand new,Used!!!! Lol

Nevermind died again. Found the braided engine block ground wire hanging though. Sanded and put a new one on. And just switched out dead new battery again. Thanks Walmart Times 2. Showtime tm morning.