Do all of them use 194 bulbs that can be pulled out of the holder and replaced? I ask because I have a new electrical oil pressure gauge and the 194 bulb pulls right out. But I have an older boost gauge and the bulb wont come out. Is it just really stuck in there, or are there 2 different kinds?

 

Might be a twist lock.

 

nevermind, i just had to pry it out w/a screw driver.