As a few of you know, I now have a 2005 Yukon SLT 2WD. The 3rd brake light didn't work when I bought it, so I thought it might've been the 3rd brake light itself. Well I just got a new 3rd brake light and installed it and it still didn't work. I checked the fuse box but I couldn't find a fuse for it. Any input or advice would be greatly appreciated.