TRUCKIN' TRANSFORMATIONS
In the course of producing the GMC Syclone and Typhoon, GM/PAS and third-party companies modified several trucks after they were originally completed by GM. These trucks are classified as conversions. The only exception to this pattern is the Saudi Syclones, which were modified by GM in order to be ready for export.
Both the Syclone and Typhoon had conversions done with the Syclone having more known variants. Many conversions were modification of the exterior - mainly with paint or additional graphics added. A few trucks did get extreme makeovers with extensive paint and body modifications.
1991 GMC Syclone Marlboro Edition
The ten GMC Syclone Marlboro Editions are the most notable conversion trucks due to their publicity in the Phillip Morris Marlboro sweepstakes giveaway and eye-catching modifications. Another stand-out conversion truck is the PPG Syclone with its distinctive and bold metallic paint job of silver, teal, and magenta colors.
1991 GMC PPG Syclone
Not all of the conversions were over the top with graphics or body modifications, such as the Marlboros or the PPG Syclone. Some trucks took a more understated approach, like the Saudi Syclone and Typhoon. Before exportation, the Saudi trucks were altered to accommodate the restricted availability of high-quality fuels in the Middle East. They also had their gauge clusters replaced to display metric measurements found in the standard GMC Sonoma and Jimmy. These clusters would normally have been used for vehicles destined for Canada and do not feature a boost gauge.
While both the GMC Syclone and Typhoon were used for conversions, to date there are no known production Sonoma GT trucks that received any official conversion by GM, PAS, or any outside third-party company.
SYCLONE CONVERSIONS
1991 GMC Marlboro Syclone Edition
LeRoys Customs GMC Syclone
TYPHOON CONVERSIONS
1992 Saudi GMC Typhoon
The Typhoon was never bulk exported to Saudi Arabia, and it was left up to customers to specifically request the import. One particular 1992 model was imported by the Riyadh GM dealer Al-Jomaih Co. for HRH Prince Turki.
The interior of the Saudi Typhoons was the same as a standard 1992 Typhoon apart from the exchange of the dash for the metricized version. Mechanically, the vehicle had the same oxygen sensor and resonator changes as the Saudi Syclone.
1992 Indy Typhoon
Geiger Typhoons
Geiger Cars started by Karl Geiger, is a German-based company known for its history in racing, sales, parts, and services. Geiger modified a handful of Typhoons that ranged from simple bolt-on parts, interior modifications, and full engine swaps (LT-1 V8s).
One of the more prominent trucks Geiger built was a 4-door blazer in which a widebody cladding kit was fitted and powered by a twin-turbo V8. The interest in the widebody cladding for this truck has long caught the interest of owners, however, it is confirmed that the molds to make the cladding were destroyed years ago.
It is unknown how many Typhoons in total were modified by Geiger. There are still a handful of trucks around Europe and some were exported back to the US.
