International SyTy Registry

GMC Syclone, Typhoon, & Sonoma GT History and Data

ISTR Memberships now OPEN! ISTR Memberships now OPEN!
Show your support for ISTR and become a certified member! ISTR is your link to historical data, technical information as well as up to... ISTR Memberships now OPEN!

Show your support for ISTR and become a certified member!

ISTR is your link to historical data, technical information as well as up to date news and events going on in the SyTySoGT community. By registering as a certified member, you are helping to keep this information available as well as to be able to continually grow and add more data amongst owners and enthusiasts. By establishing a professional community, we not only support ourselves but help draw attention and gain the support from outside vendors, publishers, or affiliates who might not otherwise get involved. ISTR is a registered non-profit organization and operated by owners and enthusiasts of the SyTySoGT. Information provided on this site is a combined effort of years of research and efforts of individuals who have put forth the time to acquire accurate information and data on these unique trucks.

ISTR offers 2 option of membership packages, Premium and Standard.

By becoming an *ISTR Premium Certified Member, you will receive:

  • ISTR T-Shirt
  • ISTR Membership Card (Personalized with your name and ISTR ID #)
  • ISTR Decals
  • ISTR Storm Sighting Cards
  • Enhanced Forum Access
  • Automatic Entry in ISTR Members Only Giveaways
  • High quality copies of the official PAS Build sheet(s) for your truck, a $25 Value!

By becoming an *ISTR Standard Certified Member, you will receive:

  • ISTR T-Shirt
  • ISTR Membership Card (Personalized with your name and ISTR ID #)
  • ISTR Decals
  • ISTR Storm Sighting Cards
  • Enhanced Forum Access
  • Automatic Entry in ISTR Members Only Giveaways

PURCHASE YOUR MEMBERSHIP PACKAGE HERE!

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