1991 Buick Riviera 3.8L SFI OHV 6cyl
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405 N COLLEGE ST
Notes: Does not include 2007 Silverado Classic, Sierra Classic, Sierra Denali Classic, or information specific to diesel engine models, CNG models, hybrids or models equipped with rear-wheel steering.
Notes: ******* Customer instructions ******* To activate online subscriptions: 1. Locate subscription activation code within CD Packaging. 2. Install CD (see "how to Install This CD" within packaging). After CD installation, click "Activate DIY Now" on the home page. 3. After browser launches to www.ALLDATAdiy.com, select your vehicle year, make, model, then engine. 4. Enter your username and password including personal information and the subscription activation code found within CD packaging at bottom of web page. No credit card information is necessary.