It was either taken off the market temporarily or was sold. You can search for all available vehicles here.
Model info:
The GMC Canyon is a midsize pickup truck manufactured by General Motors under the GMC brand. It was introduced in 2004 as a replacement for the GMC Sonoma and Chevrolet S-10. The Canyon is available in both rear-wheel and all-wheel drive configurations, with a choice of gasoline or diesel engines. It competes with other midsize pickup trucks such as the Toyota Tacoma, Ford Ranger, and Chevrolet Colorado.