What's the 2001 Chevy silverado fog light bulb size?

The 2001 Chevy Silverado comes standard with A880 fog light bulb size. This is a very common type of light bulb and You should be able to find it at most major auto parts stores. When Your fog lights are not working the first thing I suggest that You check is the fuse to them. If this is blown then it will need to be replaced with a new one. When the fuse is fine the next thing to look at is the wiring at the back of the bulb. As long as this is tight and not fraying then it is most likely a problem with the bulb burning out and then it will need to be replaced with a new one.