The 2004 GMC Envoy XUV is available as a 4-door, 5-seat sport utility. Starting at $35,925, the 2004 GMC Envoy XUV SLT 4x2 is powered by a 4.2L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 19-mpg on the highway. The top of the line 2004GMCEnvoy XUVSLE 4x4 , priced at $ 33,575 , is powered by a 4.2L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 20-mpg on the highway.