Need help finding out why my truck won't start

Hello, your concern sounds initially like a battery concern - either a battery that may have 12 volts but is unable to be charged fully and handle a load. Additionally, you could have some kind of cable connectivity issue -- either from not being secure or from corrosion building up. There are other possible causes, like electrical ignition switch, shift lever position sensor issues - but hands on testing will be needed to confirm what may be happening. www.repairpal.com/repair-shops