The 2002 GMC Sonoma is available as a 2-door, 3-seat regular side. Starting at $13,975, the 2002 GMC Sonoma SL 4x2 Regular Cab 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 2002GMCSonomaSLS 4x2 Regular Cab 7.5' Box , priced at $ 16,538 , is powered by a 4.3L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway.