In its second year of production, the GMC Envoy XL full-size SUV got some extra towing capacity and a new powertrain: an optional 5.3 L, 300 hp V8 engine with 4 speed automatic transmission. Otherwise, the stretch version of the Envoy comes in 4 trims: the XL SLE 2WD, XL SLE 4WD, XL SLT 2WD, and XL SLT 4WD. All 4 have 4 doors, seat 7, and sport a standard 4.2 L, 275 hp I6 engine with 4 speed automatic transmission. As for gas mileage, expect to get 15 mpg in the city and 19 on the highway. The SLT gives you a little extra comfort with its standard power and leather seats while the 2WDâ??s offer a little more in the way of safety with optional traction control. 4WDâ??s can tow up to 7000 lbs. while 2WDâ??s can lug up to 7200 lbs. Overall, drivers like the â??03 Envoy XLâ??s roomy interior and capable powertrain selection. However, theyâ??d also like to see better gas mileage for a full-size SUV. In the end, the jury will need some time to deliberate before deciding whether the Envoy XL can compete with the big boys in a competitive market.