2000 GMC Envoy Owner's Manual - Page 82

FIRST (1): This position gives you even more power but lower fuel economy than SECOND (2). You can use it on very steep hills, or in deep snow or mud. If the selector lever is put in FIRST (1) while the vehicle is moving forward, the transmission won't shift into first gear until the vehicle is going slowly enough. Tow/Haul Selector Switch Your vehicle is equipped with a tow/haul selector switch. This switch is located on the shift knob. NOTICE: If your rear wheels can't rotate, don't try to drive. This might happen if you were stuck in very deep sand or mud or were up against a solid object. You could damage your transmission. Also, if you stop when going uphill, don't hold your vehicle there with only the accelerator pedal. This could overheat and damage the transmission. Use your brakes or shift into PARK (P) to hold your vehicle in position on a hill. You can use this feature to more efficiently tow or haul a heavy load. See "Tow/Haul Mode" in the Index for more information. 2-20