The bulbs behind the HVAC controls are a NEO4, as listed on http://superbrightleds.com/instrument.html
, as well as the bulb that lights up A/C and Recirc (the words not the activation as those are soldered in and pretty much unnaccesible.) The hazard light and the rear defrost (both indicator and picture) are NEO3 bulbs. Be very careful when replacing them as there is no wiring harness for them. They simply twist in and out of the particular hole and have contacts that get wedged between the base and the HVAC controls.**If replacing with LEDs** When relpacing these bulbs with LEDs, it is best to mark one side of the base. This will help you if you put the bulb in backwards are they are polarized.Also to add to kevera's reply, it's a #74 wedge. They do make #74 bayonet (round) as well so I figured I'd throw that in there.
April 2010 Co-MOTM * Custom LED Gauge Cluster swap * LED dome, HVAC, and shifter * Retrofit projector w/ blue halo * Kenwood KDC-HD942U * Herculined cargo area * Debadged *Wolfman's Garage