1981 Chevrolet Blazer Sales Brochure. The new Blazer retains many of the traditional features that have made it so popular with 4-wheel-drive enthusiasts. Yet it has numerous improvements that make it even more desirable for 1981. Its tough double-wall construction and channel-type steel fram are still there, but this year's Blazer is lighter in weight. There's a new optional V8 with Electronic Spark Control, an improved 4.1 liter six, and an optional new 4-wheel-drive system. Plus, new standard tinted glass for all windows. The new Chevy Blazer for 1981, an important step ahead. Specifications and colors on back.