There are a lot of variables at play here. What is the quality of the pads and rotors that you used. Did you even change the pads? What are your stopping habits? Is the truck empty or loaded? All this comes into play. Sometimes all at once. But probably the biggest thing is breaking habits. A ton of folks like to wait till the last possible second to apply their brakes and try to stop in ten feet. What they should be doing is gradually slowing by gently applying the brake. Give yourself a lot of room to stop. Your brakes and your wallet will thank you.
 
Matthew Vaughn