Chevrolet K5 Blazer
In 1973, GM's line of full-size trucks was redesigned and updated. A tilt-steering wheel became optional. Although rear-wheel drive Blazers were manufactured until 1982, the majority sold were four-wheel drive.
Until 1975, the K5 had a removable convertible top. In 1976, a half-cab design was introduced and used until 1991.
Source: Wikipedia, 2013