International SyTy Registry

GMC Syclone, Typhoon, & Sonoma GT History and Data

Growing up SyTy
For most car and truck enthusiasts, speed and power are 2 of the top tier must have items in their ideal vehicle. Of course, the Syclone and Typhoon came with both from the factory with its 13 second timeslips and 300hp 4.3 V6 powerplant and still reigns as one... Read more
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... Read more
SK Kustom’s Typhoon – 10.49@129
Congrats goes out to Sean Krupa for his new personal record on his Typhoon 2.0 build and going 10.49@129mph (with a best of 131mph) with a 1.59 60 foot!  Oh, and best of all? The truck is 100% streetable and not just a trailer and track queen. In fact,... Read more
Hemmings Muscle Machines
In the July 2017 issue of Hemmings Muscle Machines Magazine, a feature article was published called – “Two Out of Three Ain’t Bad – 1993 GMC Typhoon”. Written by Jeff Koch (an author who is familiar and written past articles on our trucks) goes on to write: The great... Read more
Car Fix on Velocity
Car Fix is a show on Velocity TV hosted by Lou Santiago and Jared Zimmerman. The premise of the show is to fix and restore vehicles from the classics to modern day vehicles. In Season 5, Episode 13, Car Fix is working on a GMC Syclone owned by Keith Gill from... Read more
Garage Squad

Garage Squad

GeneralProjects November 19, 2016 0

Velocity Channel features a series named “Garage Squad” in which the hosts rescue weekend mechanics who perhaps lack the time, resources or simple know-how to get their “project” autos road-worthy again. National Hot Rod Association world champion driver Bruno Massel, co-host Heather Storm and lead mechanic Joe Zolper bring expertise,... Read more
Project ZS-1

Project ZS-1

Projects November 25, 2014 0

Project ZS-1 begins as Dennis Harmon begins a new build on his Syclone. Purists brace yourselves, this monster is going V8.

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Operation Garnet

Operation Garnet

Projects November 25, 2014 0

With only 24 Garnets produced, this rare color truck was in desperate need of saving from its current state of condition. Operation Garnet is underway.

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