1991 GMC Sierra 2500 Review

Cost to Drive^{Cost to drive estimates for the 1991 GMC Sierra 2500 2dr Extended Cab 4WD LB (4.3L 6cyl naturally aspired 4M) and comparison vehicles are based on 15,000 miles per year (with a mix of 55% city and 45% highway driving) and energy estimates of $3.15 per gallon for regular unleaded in Wyoming.}