Ok, this will sound VERY strange, but if the truck is not having any actual problems other than the lights being on, check your battery and/or alternator. As the manual states (I forget where, but remember reading it), these lights can come on as a symptom of low battery voltage. If your battery is not charging right (due to either the age of the battery, or an alternator problem) it can cause the lights to stay on. I had the problem in my car after I had been working on my with the car powered up and the engine not running. The next day when I started the car, the lights were on. But, once the battery was recharged, they went away.