194 For side marker/front, 1157 for front and rear signal/park lights
2057 bulb you can find it cheap at walmart.
Need to know what year it is, it makes a difference.
More information is required to properly answer your question. Are you referring to the turn signal bulb, flasher or switch? SWITCH
I haven't done this on my Blazer yet but my manual says to reach up behind the bumper to the light socket, twist it and it will come out of the housing with the bulb so you can change it.
1995 Chevy Blazer turn signal light bulb replacement: Purchase the correct replacement turn signal light bulb(s) first, before disassembling the vehicle. See sources and related links below for replacement bulb information. Then consult your owner's manual for the turn signal light bulb replacement procedure. As simple as it sounds, the owner's manual is the best place to start for bulb replacement instructions and illustrations. You may want to consider replacing both left and right at the same time in order to keep brightness and color equal (optional).
How do you replace a turn signal bulb in a 1998 cavalier
low beam headlight bulb type: 9006
how to change front left turn signal bulb on a 2004 chevy express
Answer : unscrew the signal lens and remove the signal bulb and replace with 1157 bulb reverse process
how do ypu change front turn signal bulb on Oldsmobile 1991 cutlass cierra
how do i change driver side turn signal bulb on 1992 dodge caravan?
According to my Haynes manual you reach up behind the bumper to the back of the light and turn the socket and pull it out so you can change the bulb. I believe it turns counterclockwise 1/4 turn to release it.