PONTIAC BONNEVILLE INSTRUMENT CLUSTER REPLACE/REMOVE

Motor Idles Rought And Hard To Start

My Cluster No Longer Works And I Need To Replace It, If I Replace It With A Used One. Does My Mileage Stay Or Is It Stored In The Bcm?

The Car's Gages Go Crazy Back And Forth. Oil, Fuel, Battery, And The Rpms Run High. I Have Replaced The Oil Pressure Switch, Egr...