Gauges not working

Good evening,

It sounds like a bad connection. I would remove the cluster and check the connection at the rear of the cluster. Make sure the pins are clean, tight and no damage.

Beyond, that, the cluster itself is the issue.

Roy

INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT

REMOVAL PROCEDURE
1. Remove the left closeout insulator panel.
2. Remove the knee bolster trim panel.
3. Remove the instrument panel cluster (IPC) bezel, Chevrolet only.
4. Remove the instrument panel (I/P) accessory trim plate, GMC or Oldsmobile only.

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5. Remove the screws retaining the IPC to the I/P.
6. Partially remove the IPC from the I/P in order to gain access to the electrical connector.
7. Disconnect the electrical connector from the IPC.
8. Remove the IPC from the I/P.

Welcome to 2CarPros. This unfortunately is a common issue on these dash panels. It is caused by bad solder joints on the resistors and a voltage regulator on the circuit board. If you have the tools and soldering skills it isn't a hard repair, if you have not done circuit board work however you would be better off removing the cluster and sending it out for repair as it is very easy to damage the board with heat. Then it may not be repairable.

To remove it you remove the trim on both sides of the lower dash in the drivers side. This allows you to access the screws that hold the cluster in. Be careful removing it as it is very easy to scratch the lens area. There are a number of places that repair them. If you want to see what the repair is like find the jeffescortlx channel on youtube he repairs a lot of them.

You could install a used unit but unless it's a known good one you could end up with a worse problem than you have.