I just opened up my 2001 Buick Century for the same problem. I think the 2002 is almost identical, so this probably applies to you. It turns out the instrument cluster is one large module. Most of the warning lights are LED's, the constant-on and dimming lights are incandescent bulbs, but the odometer and gear indicator display is an LCD. If it is not lighting up, it is a module. There is no back light to replace. When I got down to mine, I could see the location of a burn-out on the LCD. It is possible the same happened to yours. I was hoping to replace just some back light bulb but it is just not possible.
I have not found any reputable dealers with instrument clusters for sale, though there were a few on eBay. I do not know if I want to put those into my car though. I am just going to call up a dealer and see how much it will cost to have them install a new module. (Probably too much, but I am kind of over a barrel on this.)
Friday, March 21st, 2008 AT 5:14 PM