Doug,
There could be multiple issues going on here, a loss of power to the cluster could cause the issue. Check the under dash fuse panel, location #21 which is 5 amp fuse. For further diagnostics, please call in and speak with one of our technicians 800-417-4559.
David,
Do you have the cluster still? We can repair those clusters, so if you have one that has issues just send it in, if you do not have it any longer, then we would need one of the same part# out of another truck, with that we can duplicate it to create a replacement cluster from new clusters we have here. Give me a call if you have questions 800-417-4559 ask for Alan