I'm installing a 3rd Brake Lamp P/N GM559-B0000 (fits a Chevy Blazer and H2 Hummer).
Now the question is; where am I going to install it? The original location is at the upper edge of the rear clamshell window. My friends say it will take away from the mold line of the car. They want me to install it under the clamshell at the upper edge of the window. You'll be able to see the light through the window but it will be "hidden". I tend to agree but the light may highlight dirt when illuminated. Trial and error...