Interior Bulb ID

[GTX63]

I did a search before starting this thread so apologies if I missed the information. I know that the standard dash cluster bulbs are 194s. However I am trying to locate the original #s for the heater control bulb, the lower dash courtesy bulbs and turn signal bulbs.
I am switching everything over to LEDs on a 1974 C10. Most of the online vendors use their own part #s so I don't have the oe numbers to match those bulbs to LEDS.

 

[fast 99]

Seriously consider NOT using LED for exterior. Many posts on problems associated with it.

LED bulbs are a computer circuit. These older vehicles do not have clean enough circuits.

Been there done that.

 

[GTX63]

I agree and am not interested in swapping out the exterior lighting. I'm just trying to gather a list of the interior bulbs sizes/numbers for reference when doing interior led lighting.

 

[Matt69olds]

Pretty sure there is a bulb chart in the owners manual.

Most dash lights are 194. Warning lights or turn signal lights are sometimes 168, same bulb design but slightly higher wattage and just a bit brighter. I’m guessing GM did that help get your attention if the bulb comes on.