Reviewed By Johnny C (HEPHZIBAH, GA) Reviewed for a 1999 GMC C/K 2500 —5/15/2013 4:26 PM
This product do what they claim it does. I just had a little issue first when trying to install it but after contacting Superchips directly they had an update that fix the issue. Truck is now running a lot better.
Reviewed By Charles A (Spokane, WA) Reviewed for a 1997 GMC C/K 2500 —10/5/2012 3:29 PM
It installed easy i did have to download a new progam from internet For my specific vehical 97 gmc sierra 2500 4x4 noticed beter throtel Response i havent got to tow the trailer yet when i do ill change the rating to five out if five If it goes up the hills beter
Reviewed By Charles S (Greenfield, WI) Reviewed for a 2004 GMC C/K 2500 —8/4/2012 2:30 PM
I bought this so that I could hopefully improve fuel mileage while towing my 14,000 lb trailer. After 800 towing miles I have not seen any change from stock. I do see less downshift on grades which means more HP.