The 1991 GMC Vandura is a full-size van produced by General Motors under the GMC brand. It was part of the third generation of the Vandura line and was offered in various lengths and roof heights to accommodate different passenger and cargo needs. Standard features for the 1991 Vandura included air conditioning, power windows, and a vinyl bench seat. Engine options included a 4.3-liter V6 and a 5.7-liter V8, both paired with a three-speed automatic transmission. The 1991 Vandura was widely used as a commercial vehicle for transporting cargo and passengers, as well as for conversion into recreational vehicles (RVs) and camper vans.