How do you change the headlight on a 2000 Chevy Express Van

It looks like the van has the old style, sealed beam. That one is held in with a metal ring that has four small screws that are seen from the front. Remove the two top screws and you can pull the trim down to remove the bulb. You can also remove all the screws if possible but I have found that they are usually rusted in place.

Thanks for your response but it is not a sealed beam. I have to approach my headlight from under the hood. I can reach the bulb and it looks like I am supposed to push and twist to release the bulb, but it won't twist and release.

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