I read your post l will help you first if you do not have code reader and cable to hook to truck the only way to read codes is to go through the gas
pedal as long as it is not the problem.first you have to turn key to on position with out starting then count 3seconds after that hit gas pedal down 5time within 5seconds than take foot off pedal count 7seconds than hold petal down untill light starts to blink codes than take foot off pedal and write down codes the codes are all 4digits but if a code has a zero in it the blinks will be ten blinks in a row when all codes are finished four ten blinks will be in a row note to do the pedal it takes a lot of practice l would use stop watch if does not work just turn key off and try again it might take you a little time to get it it's all on timing with no errors after you get codes get back to me l will try to tell you what it is and how to try to fix it. good luck.