first check the fuses......maybe the cluster of gauges shorted out?....may need to replace it.
we are about to customize my dash with the same style electronic gauges that are in my firebird.. we will customize the dash with a piece of stock that is cut to fit my new round electronic gauges and they will hook right up to the original harness... good luck 2 u...
the transmission will not accommodate a manual speedometer unless you replace the rear housing on the trani.... yes alot of money for the change over.. you can replace it with the round electronic gauges which is what i am doing to get rid of the cluster!! you can use manual oil and temp gauges.you just have to customize the dash section for those clusters. well worth it 2 me.
in the dash
a dash cluster, is the gauges and lights etc that are grouped together in front of the driver,
Check your fuses.
You will need to remove the gauges and dash . I did it at a junk yard it was lots of work . Also , you will not need unusual tools on the upside.
#4 fuse blew
The dash light brightness control may be turned off, check the switch.
the dash lights and tail lamps are on the same fuse. you might also replace your headlight switch,they are prone to going bad CHECK THE WORED FUSES UNDER DASH AN UNDER HOOD IF NOT TAKE OUT THE GAUGES AN CHEK THE BULBS..
In the fuse box under dash, left of steering column.
a fuse or a bad connection where it plugs in to the dash