GMC SIERRA TOWING

I Have A 2000 Gmc Sierra. I Press The Tow/ Haul Button. The Light Doesn't Go On And The Truck Doesn't Seem To Be In Tow/haul Mode

I Need To Know The Towing Capacity And Specs For My Truck Listed Above It Is A 1500 Reg Cab Long Bed 350 Four Speed Automatic.

I Had A Fuel Pump Go Bad Today And Needed Towed 30 Miles Into Town I Did Not Shift The Transfer Case In To Neutral, Did I Just Burn Up The...