The bulbs are PC74. They are a regular 74 bulb with a locking base. Some people have had luck getting the bad 74 bulb out of the base/holder and bending the contacts so the 74 would work. I have a bunch of bulbs out on my 2001 cluster but haven't gotten around to swapping them. You have to lower the steering wheel, pull the housing around the steering column to get to a couple hidden bolts, then remove the cluster trim, then unbolt the cluster (4 screws) and pull it out. The bulbs just 1/4 twist turn out of the cluster.