Having problems with your 1991 Buick Century ?
Proportional valve for the brakes is defective. Where can I find one? No one locally has the part. Hershey, Pa 17033
You may find one in the junk yard or the GM dealer can order one for you.you will need the vin# of the car to get the right one.
Repair Help & Product Troubleshooting for 1991 Buick Century
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