The 2004 GMC Canyon is available as a 2-door, 3-seat regular side. Starting at $00, the 2004 GMC Canyon SL 4x2 Regular Cab All is powered by a 2.8L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 21-mpg in the city and 27-mpg on the highway. The top of the line 2004GMCCanyon4x4 Crew Cab , priced at $ 00 , is powered by a 2.8L , 4 - cylinder engine mated to a manual transmission that returns an EPA estimated 19-mpg in the city and 23-mpg on the highway.