2003 GMC Envoy Owner's Manual - Page 287

Weight of the Trailer How heavy can a trailer safely be? It depends on how you plan to use your rig. For example, speed, altitude, road grades, outside temperature and how much your vehicle is used to pull a trailer are all important. And, it can also depend on any special equipment that you have on your vehicle. Look in the following chart to find the maximum trailer weight for your vehicle. 2WD Envoy (L6 Engine) 10,500 Ibs (4 762 kg) 4WD Envoy (L6 Engine) 10,000 Ibs. (4 535 kg) 2WD Envoy XL (L6 Engine) 4-54