The engine turns over then it dies

Nothing working on the instrument cluster ? Shouldn't be a battery problem with being only five months old. Turn on the headlamps , do they shine bright ? Does the check engine light come on when you turn the key to the on position ? Do all warning lights come on with the key on , then some go off after a few seconds ? Checking for diagnostic trouble codes in the instrument cluster would be a good thing to do also . The Instrument cluster could be the problem .

I am assuming you mean you loose power steering when the steering wheel locks up, which would be a normal event if the engine dies. Same goes for the battery light since the alternator would stop charging the battery.
Someone will need to figure out if you are loosing fuel or spark when the engine dies, then troubleshoot the problem. It may be difficult to find if the mechanic can not duplicate the problem in the shop.

You can use obd2 scanner to check the engine system.

have u changed the fuel filter?

You may be making this too complicated.
When the air temp is high, the battery can become weak. So a battery that tests "good' today may be "fair" when it is 90 degrees.
Heat and lack of water are the biggest killers of car batteries.
And a starter can take twice as much current to operate when hot than when cold. Dampness and humidity are also factors in electrical circuits.
I would disconnect the battery when the truck is going to be parked for more than a few hours until you find the problem. That way you will know nothing in the truck is draining it.
Also, you should have the output of the alternator checked. A failing alternator would not have anything to do with the check engine light on your truck. The alternator can be charging 5 amps which would be enough to knock out the battery light, but not enough to handle the heat and the load of running the ac. It should be able to charge 40 or 50amps at road speed when needed.
The check engine light and rough running stuff does not involve the starting system. Only the battery, starter, and cables.

if you can jiggle the battery cable, its loose. or dirty,tighten the cable ends...tight. You may need to disconnect the battery and make sure that the ends are clean and bright.

multiple symptoms are usually caused by faulty ground connections, in you case probably engine to body strap, use booster cables to establish ground fron battery to engine then engine to body, if it solves the probem then clean all grond connections and battery cables, there should be a strap at the rear of engine to body

I would say it may be the distributor, I would start there first. You may want to try a tune up first to see if it helps and I would definitely get my battery checked out since winter is approaching and it has been run down a few times. hope this helps tim

souhds like a blownhead gasket ,remove radiastor cap fill with water have someone crank engine over and see if water is spitting out if so thic confirms head gasket is blown

Electrical problems of an intermittent nature are the most difficult to solve. It sounds as if something is draining the battery. The charging system needs to be checked with diagnostic equipment. Something like a parasitic drain may be causing the battery to run down and the alternator cannot keep up with the demand. When something like power windows are activated, they draw a higher amount of current to get started than they need to keep rolling, and this surge of energy may be robbing the injectors of the current they need to allow fuel delivery. I experienced a problem like this on a customers car, and we found that the trunk light was staying on when the lid was down. This was enough to keep the battery from becoming fully charged, and the alternator had to be replaced from being over-worked.