Turns out that it's a battery cable. A $150 battery cable that needs an hour and half labour to be installed. At $85 an hour this is not cheap. I'll post the exact part number tomorrow if anyone cares...

 

I also had this problem with my truck....what pissed me off is it's not coverd under warenty..my truck wasn't even 4yrs old and having the wire corroded through...I also had the same problem with a wire for the day-time-running lights...the wire's where only $20.00 dollars the rest was labour and dianostic came to around $400.00 dollars all this for 2 wires...what a rip off