Tail light bulbs

1156 is a turn/ stop only bulb. Back in the day when you saw older pickups like all the old 50's Chev/ GMC pickups it was common to see add on turn only systems on the front fenders and to the rear. All 4 bulbs were 1156 and turn only

This is why we need REAL parts people now adays. Back in my day, we had a PAPER bulb spec list, that showed base types, wattage, candelpower, etc of lamps and bulbs. You can still (sometimes) find them to download on the www