- GMC
 - Official site for the General Motors division with information on vehicles, a dealer locator, and more. - Colorado K5
- For 1969-91 Blazer/Jimmy, Suburban, and GM trucks.
- Syclone & Typhoon Mailing List
- Providing information from the Syclone & Typhoon mailing list. Subscribe here.
- Sport Machines
- Syclone, Typhoon and Sonoma GT site.
- Chevy/GMC 4X4
- Features such vehicles as the Jimmy, Blazer, Tahoe, Suburban, and pickups, with common modifications, project vehicles and more.
- Northern California Chevy/GMC Truck Club
- Covering pickups from 1911 to 1972.
- 1967-72 Chevy Truck
- Devoted to 1967-72 Chevy and GMC trucks. Includes pictures, history, information, and links.
- Yahoo! Autos: GMC
- Features information on current models and used car listings.
- Florida Association of Syclones and Typhoons
- Home of the Florida Sy/Ty crew.
- TrailVoy.com
- Chevy Trailblazer and GMC Envoy forums for owners, mechanics, and enthusiasts. Includes discussions about mechanical and technical information. Also features classifieds, photo gallery, history, and recall information.
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