Review on Bulb Terminal Shape by CEC Industries: Optimize Your Search by Daron Ellis

Replaced the backlight in a 2006 Silverado head unit. Worked great for all but the 2 original bulbs. These 2 are a bit bigger but these still worked fine. Be careful when removing the blue silicone caps. One of mine broke and I had to use RTV silicone to reattach it. If you don't replace the covers, the backlight will be orange instead of the bluish white of the original bulbs and will not match the rest of the dashboard lighting. Will probably buy them again to help a friend fix his radio.