how hard is it to tow with your gmc? i imagine it would be difficult and your tranny probably hates it.
Pulling on the Freeway is awesome. I can do 70 up to truckee no problem pulling my toyota. It is when i get into canyons that it doesn't like to pull. There are a couple hills going up to the Rubicon that can get kinda slow too. I really don't want to kill my tranny.