Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi Dave, I'm Ron
This actually sounds like a bad connection to the dash cluster behind the dashboard, seeing that it intermittently worked. Going under the dash first with a light would be my first course of action, this would allow you to see how much is accessible before pulling out the cluster. You just may be able to reach up there and disconnect/re-connect the connectors in hopes that's the problem and not the cluster itself. I hope I helped you Dave, please let me know if you have any further questions.