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they have 2 sizes - the smaller one is i believe the correct one for the trac switch - although take the bulb uve removed in with you to make sure - make sure its a 12v bulb labeled on package - has long metal wires extending from the bulb - not with plastic sleeves -
The one for my TRAC switch is actually a T4. I ordered all LED lighting for Vol/ Temp, Doors, foot well lighting, gear shift and key ring today. I ordered in cool white and green to see which one I liked the best.