I just picked up a 2000 C5, so far I really love it. Real clean 1 owner car. My only problem is, one of my DRL are out. I can't figure out how to replace that bulb. It looks like I may have to go into it from the wheel well??? Can anybody help?? Thanks

 

On my 2003 coupe, I found the bulb holder to beinstalled vertically, bulb on top of connector. The connector itself has to be squeezed to drop the connector with the bulb in it downward. My c5 can be reached with the headlight open.
Make sure the headlight cannot close while one's arm is getting the connector
loose. My connector doesn't have a very long pigtail so it took both hands to remove and install the new bulb........ good luck....... cjs

 

there is a cooling duct in the grill,push in hose in and away from the t/s light now put your hand in there and push release then turn on light socket. might be 3157 na

 

Thanks greatly for the info, I will go and give it a try...

 

It worked great. I actually had to use alittle of both your ideas. I got it out from the top, then release the wire and socket throught the caliper vent hole. It worked great thanks again....