Are you sure they are burnt out?? A 1998 model year vehicle is much too young to have theat many burned out bulbs. There is something else that is causing this problem.
The bulbs are actually soldered into the circuit board. The only way to change them is to dismantle the whole cluster and desolder then re-solder the bulbs.
Remove the headlight assembly to gain access to the bulbs.
there is two rods that go through the housing from the top. turn them to unlock and pull up and out then the whole assembly comes out and you can change the bulbs.
Remove the headlight assembly to gain access to the bulbs.
the plug on the back side of the bumper twists to the left and you pull it out of the bumper
if your stereo is no longer illuminated, sorry for your luck. these bulbs are inside the radio unit, and are soldered in place, if you are familiar with how to solder, you might be able to disassemble the radio, and replace them, but its probably less frustrating and time consuming to replace the stereo, with a new or aftermarket unit.
Inside the bed is bolts that hold the housing in place. remove and you will be able to get out the bulbs. Use a clean rag to keep the oils from your fingers off the glass. Toms 2003 red silverado
There are two bolts holding the headlight buckets in, you will need to remove them to get at the bulbs. The lens will come out and you will pull the bulbs out of the lens itself. They are hex head bolts, DO NOT TURN THE TORX SCREWS THEY ARE THE ADJUSTING POINTS FOR AIMING.
There are many bulbs on a vehicle, need to know which bulbs you want to change.
http://superbrightleds.com/
These kind of bulbs only light up around Christmas time.
Check the bulbs,if not the bulbs you most likely have a bad ground.