How do you replace the headlight bulb located on a 1998 Chevy Astro?

These are not sealed beams. I just replaced the bulbs and it's fairly straight forward. The low beam bulb is a #9006 and the high beam bulb is a #9005 Sylvania. This is an assembly that you need to take out first. It's 2 10 mm bolts on the top. Once those are removed, you can get a one that is on the left hand side. It holds the signal light I think. Once that bolt is removed, the little marker light or signal light pops out easily. In there you will see one more 10 mm bolt. Remove that and the whole assembly will be in your hand. There is a little metal plate that helps hold the bulb in place. You should be able to just turn the bulb to the side (either left or right depending on which bulb) and it pops out of it's socket. Pop the new one in and you're ready to bolt the assembly back onto the front of the van. It took me about 20 mins to figure it out and do it. I could probably do it in 10 the next time. Hope that helps.

I believe this is the case for all Astro and Safari vans 1996 and newer.