We've made two short trips in the last couple of weeks, and so far the engine light has not come back on. I have noticed another small problem, the inside plastic trim around the driver door is popping loose. The dealer checked with trail-lite and they said it's GM's problem. Took it to a GM dealer and they said since the trim was altered by trail-lite, it has to be fixed by trail-lite. Too much of a hassle, so I'll try and take care of it myself. Hope you have a nice trip, Dan. Keep us posted.