The Syclone was built by GMC.
Syclone answers
When did GMC stop making the Syclone?
GMC stopped production on the Syclone in the 1991 model year.
What years did GMC make the Syclone?
The GMC Syclone was produced from 1991 to 1991.
GMC model
The Syclone was built by GMC.
GMC stopped production on the Syclone in the 1991 model year.
The GMC Syclone was produced from 1991 to 1991.