I had a 2001 Buick century with an instrument cluster that had an inoperatve odometer, PRNDL display. The lights behind it won't work. We went to a local mechanic and he said we would need to replace the entire dash cluster, which would cost us about 250$. He has tried to get more money out of us before, so we don't know if he is telling the truth. Is he right, or is there a cheaper way to fix it?