Keep the fuel level topped off if the gauge isn't working :-)
Was the vehicle in any accidents ?
Are any other warning indicators lit?
no bus : pcm isn't commuunicating with the dash cluster

It is possible you have the same issue as MoParMan had last summer. If so,
you can read about how much work he did with tracking down and eventually
fixing his issue.  That can be found at
http://groups.google.com/group/alt.autos.dodge.trucks/browse_frm/thread/eb914356
a468d173/65438add88106d6c?lnk=st&q=&rnum=1&hl=en#65438add88106d6c
or at http://tinyurl.com/2wth7d

It may be a lot of reading, but well worth it.

FMB
(North Mexico)

On my 1998 Chevrolet S-10 Blazer, I was leaving one day from the
service call from Hell. It ws six inches or so of snow, and
unplowed LONG driveway. I was very grateful for the 4wd, and then
the dash gages went out. I called a friend of mine, who had the
answer. Right over the passengers side front wheel well (under
the hood) is the computer. Just behind that is a cable wtih a
flat multi-pin connector. Unhook that, and spray with WD-40
(Water Displacement-40, remember) and reconnect. Try the vehicle
again.

May be something similar on your vehicle.

Try rotating the key back toward off, or forward toward start.
We have this problem on our 2000 Durango after it was stolen and the column
repaired with new key cylinder and lock assy.

Curtis