Application: Perfect for Speeometer Cluster Backlight
GM automatic heater controls: 2003-2006 GM full size trucks and SUV's with automatic heater controls only, they will NOT work for manual controls. 1997-2004 For Buick Park Avenue, LeSabre, Regal Century with automatic heater controls only. 1997-2004 Corvette with automatic heater controls only.
These bulbs will have to be soldered to the PC board. You will have to completely disassembled the Cluster to get access to them. The blue socket can be discarded when using these bulbs.
Please NOTE: If the LED does not light up, simply Rotating it 180 degrees (reverse the polarity)