The 1999 GMC Jimmy is available as a 2-door, 5-seat sport utility. Starting at $18,534, the 1999 GMC Jimmy SL 4x2 2dr is powered by a 4.3L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 17-mpg in the city and 23-mpg on the highway. The top of the line 1999GMCJimmySLT 4x4 4dr , priced at $ 31,170 , is powered by a 4.3L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 20-mpg on the highway.