You must first remove the Trim plate from the dash. There is a good procedure here:
http://www.wbodydb.com/tutorials/audioinstall/Regal97-00.pdf
The above procedure is for removing the stereo, but describes how to remove the trim plate first.
There is also a YouTube video that describes repairing the instrument cluster here:
http://www.youtube.com/watch?v=84FAjLxoK00
To remove the instrument cluster on a 1994 Buick Regal, start by disconnecting the negative battery cable to prevent any electrical issues. Next, remove the trim surrounding the cluster, which may require unscrewing or unclipping various panels. Unscrew the screws holding the instrument cluster in place, then carefully pull it out, disconnecting the wiring harness and any other connectors. Finally, reverse the process for reinstallation.
To replace the instrument cluster on a 1999 Buick Regal, first disconnect the negative battery cable to ensure safety. Then, remove the dashboard trim panels and the screws securing the instrument cluster. Carefully pull the cluster out, disconnect the wiring harnesses, and replace it with the new unit. Finally, reconnect the wiring, secure the cluster with screws, reattach the trim, and reconnect the battery.
Replace resistors on Instrument cluster circuit board. $1.00 @ Radioshack and about an hour of your time...
where is the 91 vandura G2500 Instrument Panel Cluster Relay located :milsunworld@yahoo.com
Some years were interchangeable, some weren't If your problem is the instrument lighting, such as the odometer not displaying mileage. Then you would want to refurbish your cluster. I refurbish 97-04 century clusters so I think I may be able to help you out. Contact me at ANCTechnologies at hotmail.com
It sounds like the resistors have broken loose and fallen off the back or the instrument cluster. Remove the cluster and open the back. flick the resistors some may fall off.. replace missing resistors.
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Remove the instrument cluster and replace the resistors on the circuit board. You can get them from radio shack, an it's not hard to do. While you are in there, I would recommend replacing all bulbs and stepper motors to your gauge needles so you won't ever have to take the cluster out again.
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