Back in 1991, a new Syclone cost around $26k, but such is its appeal that a 6k-mile example recently sold for $81,000. In May ...

In 1991, GMC released a high-performance Sonoma variant called the Syclone. That pickup is now considered an all-time-great ...

Prices shown are the prices you can expect to pay for a 1991 GMC Sonoma 1/2 Pickup Extended across different levels of condition. Edit options.

A 1991 GMC Syclone, a high-performance counterpart of the GMC Sonoma pickup truck, has hit the auction block. One of less than 3,000 reported examples for the model year, the classic truck is powered ...