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.
INSTRUMENT PANEL CLUSTER (IPC) REPLACEMENT
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.
Wednesday, September 25th, 2019 AT 9:01 PM