First you need to jack up the car. You may want to remove the wheel but not nessary. There is a plannel just behind the air dam remome the 3 screws on the bottom and two on the side next to the wheel. Remove pannel this will give you access to the bulb socket. Twist the socket counter clockwise and pull out. Pull the bulb straight out. It's a simple as that.
Can you jack up just 1 corner of a C5???
You can do this without jacking up the car. You have to remove the little rubber support that supports the front of the hood, then turn on the headlights so they raise up. Then you can reach your arm in there to snag the bulb holder and remove it. You have to do everything with one hand, but it can be done.
This is how I changed mine. Be careful not to drop the bulb. I now have a spare lamp riding around inside the lens.
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