when should i use this button?

Imo, i'd only use it towing something over 2k lbs., and even then it may not be necessary. Just use the S modes. Otherwise D for everything else as much as possible. You'll get far better fuel economy, and your automatic tranny will learn your driving habits to perform like it should. Thats the way i broke in my truck, couldn't be happier with it now.

 

.

 

When you need an extra 50 horsepower.

 

When your gf wants to feel like she's riding in a man's truck and not some tree hugging enviro nut who who cares about feelings and the sounds of nature.

 

so ..... it's the "rolling-coal" switch?

thanks, bro