you can't replace just the bulb itself. you have to replace the whole bulb and lens assembly and you have to get them from the dealership. they are somewhat expensive but there is no other solution that i know of.
If you go to the parts store they will tell you, and since your there you can also buy them.
In a 97-03, the bulbs are soldered into the circuit board of the heater controls. Remove the heater control assembly and disassemble it to the board. Desolder the bulbs and replace with new ones from either radio shack or corvetteradios.com. The bulbs are 12v but I don't know the wattage. CorvetteRadios has bulbs for the CD player as well which are similarly soldered into the circuit board on the face plate.
http://www.corvetteradios.com/ sells the bulbs for the GM k1500 radios. They have a diagram showing how to solder them to the circuit board on their site.
They probably aren't grounded.
To fix faulty daytime running lights on a 1996 Chev Suburban, check if the bulbs are blown. If so, replace it. If the new bulbs are blown immediately upon replacement, check the wiring running to the headlights.
I hope your referring to the light bulbs. If so, I think they are the #194 mini bulbs. Your Local Parts Store will be able to verify this info.
Start with the obvious. Burned out bulbs. Replace them. this eliminate the bulbs. Save the old bulbs so that if it turns out to be something else then you will have a spare.
There is no bulb. it is an LCD display soldered to a circuit board. If it got wet its fried, replace it.
check light bulbs and fuses. light bulbs have 2 elements in them, one for stop and one for running. if thses are ok, replace brake light switch on brake pedal
You get under the running boards right under the lights. there is a little plastic housing. pull this housing down and change light bulb is that easy.
Daytime running lights on a Honda Civic are the same as normal headlights. To fix or replace them, locate the headlight housing in the front of the car. Remove the plastic housing and replace the bulbs.
Open the hood as the light bulb pop into the back side of the lens