Stock bulbs are high mount stop, meaning they go deep into the socket. If you order leds such as the 921x12led
T13 & 921 Wedge Base bulbs Specifications
They seat very lightly. Secure them with electrical tape so they don't jiggle loose or fall off in the housing when you remove them (if you have to).
A little bit of info that I didn't know until I did the swap but figured I'd pass it along
