Headlight issue

1997 Cavalier 2.2L with 78,000 miles.

I noticed the other day that my driver's side headlight was out, so I went down to Autozone and got a pair of relacement bulbs. After changing both headlights, the driver's side was still out. So just to be sure that I didn't buy a bad bulb, I tried it with the working bulb I installed on the passenger's side, and got the same result.

Then I figured that it must be a fuse. I'm not that lucky. The fuse didn't look blown, but I replaced it anyway and got the same results. So then I grabbed my multimeter. I tested 12 volts at the fuse, and 11 volts at the socket. WTF? Why isn't this working?

Any ideas?

did you touch the bulb at all?

did you touch the bulb at all?Nah, it was cold out, so I was wearing gloves. Besides, I have 4 confirmed "working" bulbs that all work fine on the passenger's side, but don't do jack on the driver's side.

And the socket that plugs into the bulb shows current, right? If so, does any of your park/sidemarker/tail/third brake bulbs fail to work? It is a weirds thing, but a failed bulb anywhere above can cause an intermittent fail at the socket when it is plugged in,

Check the ground.

is the socket clean?