Nice Astro! The Service AWD light with the clicking relay near your left foot usually means that the actuator motor for 4WD has an issue. There is a way to rebuild it. Someone on the Astro Safari Forum did a nice writeup. You could also be low on transfer case fluid. Use only the blue GM Auto Trak II fluid (or an equivalent), ATF/differential fluid does NOT do the trick! And nice on the bench! "Unfortunately" I have second row captains chairs (bolt in) and the rear row with the option to individually recline the outside seats. While more luxurious, the standard bench seats seem to be more practical. Edit: Until you fix the AWD actuator motor issue, you essentially only have RWD. Just make sure there is enough fluid in the case until you get around to fixing it.