My 2016, 6.2L gas truck all of a sudden went haywire. It completely died and won't start. When I turn the key on I get all types of system warning problems on the screen:.( engine overtemp, pressure monitor fault, service advance trac, starting system fault, the wrench icon). Then when I try to start the truck, everything goes dead. I've checked the ground wires and am not getting anything to the starter. Anyone have any ideas?

 

Suppose we start at the beginning.
Some security systems will not allow the starter to operate if there is a problem , like the key for example.
To eliminate that possibility, try your second key and see if that allows the starter to operate.


When we get a series of codes that are not related, that can be a grounding connection problem.
Don't have any idea of the condition of battery or wire connections of your vehicle, but if not clean and in good condition, system cannot function correctly due to insufficient power supply. Grounding is the other half of the circuit.