I am looking for a couple people with relatively unmodified GM trucks with AFM to test out a new product that will increase your gas mileage. Here is a link to the product www.rangetechnology.com. Basically what it does is put increase the amount of time spent in 4 cylinder mode. All that is needed is 5-10 people willing to test out the product and get the word out there by writing reviews/giving feedback. No cost to you. PM me if you are interested.