I own a 2003 ZT5 and last week the driver side headlight went out. I replaced the bulb and it was back in working order. Well 1 week later the headlight was out again. I thought maybe I got a bad bulb so I took the bulb out and tested it on the other side and it lite up just fine. So I put it back on the driver side and it will not work. It's odd because the bulb will light up when I use the high beam and it worked for a week or so when using the low beams. The passenger side headlight works fine on both high and low. I checked the fuses and they are all good. I'm not the most handy person when it comes to cars. I thought maybe it was a connection issue but not sure that can be true when it gets a connection when using the high beams. I'm at a loss and really don't want to bring it to a mechanic unless I have too. Any suggestions on what I may try? Thank you all in advance.