Tow haul switch???
So now that I have a 2003 gmc k2500HD extended cab long box to tow our fifth wheel, am wondering how to use tow haul switch, do I activate the whole time towing fifth wheel?
Forum Discussion
I have a 6.0 litre vortec, and it has the MT1 trans which is a 4L80E as I understand it, and my diffs are 4:10, previous 7.4 vortec I had 3:73 gearing.
