RBratby said:what you need to do is turn the key on but dont start the truck. then turn it back off then on then off then on and if you have a 94-95 count the blinks from the check engine light or 96-01 look at the odom and read the code it gives you. if you dont know the codes look in the 911 section and go to the top of the page and the codes will be in one of the stickies.