[VetteVet]

Ok if you measured the voltage at the battery terminals then it's the battery low which is confirmed by the boost you did got the truck going. I don't mean any offense but have you taken the Battery terminals off and cleaned them?
I ask because I have seen bad connections on battery terminals with no corrosion present and when cleaned and tightened the problem was solved. If you have not already done so, take the terminals off and clean them and also the cables. With the cable ends off and the battery terminals cleaned then check the voltage. If you get low voltage still, then I would try charging the battery or taking it to a shop and having it tested,could be a dead cell. Please don't be offended if you have already done these things but you did not give me many details on your attempts to fix your problems.

MDC if you check the post time above your user name you will see our posts are only a few minutes apart so you are still good and not a parrot.LOL