The 2001 GMC Sonoma is available as a 2-door, 3-seat regular side. Starting at $12,863, the 2001 GMC Sonoma SL 4x2 Regular Cab 6' Box is powered by a 2.2L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 22-mpg in the city and 28-mpg on the highway. The top of the line 2001GMCSonoma4x4 Crew Cab , priced at $ 25,183 , is powered by a 4.3L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 18-mpg on the highway.