Old school racing brochure. The 1988 GMC Sierra Truck Sales Brochure Single Page is a vintage piece of literature that showcases the features and capabilities of GMC trucks from that year. Made in the United States, this brochure provides detailed information about the GMC Sierra model, highlighting its performance, design, and available options. It serves as a valuable resource for collectors or individuals looking to learn more about the GMC brand and its vehicles from the late 1980s.