instrument panel replacement bulbs???

I have a 2001 Caravan and the bulb for the fuel gauge is out. The books at all my local auto part stores do not list a replacement. Do I have to go to a dealer for this or does anyone know what bulb it takes??

Thanks ET

only place I found for mine were at the dealer.very small bulbs with a plastic socket attached.easy to replace and cost about $1.50

Thanks, I'll try to get to a dealer this week.