Phone:
1-800-442-6537
1-800-442-OLDS
Email:
Mailing Address
Oldsmobile Customer Assistance Center
P.O. Box 33171
Detroit, MI 48232-5171
Online chat:
https://www.oldsmobile.com/toolbar/contact_us.html
Locate a dealer:
https://www.oldsmobile.com/toolbar/dealer_locator.html