Hey there man. You should be able to turn the light off. Try this, put the key in. Turn it on, off, on, three times quickly without starting your truck. This method will flash your codes on the dash but it should turn the light off as it's designed to replicate the few key cycles that it takes for the light to go off. Did you check your gas cap to make sure it's on correctly? Not sure about where you live, but most auto parts stores have code readers where they will check and clear your codes for free, but good luck!