2007 GMC Envoy Owner's Manual - Page 356

Dinghy Towing Two-Wheel-Drive Vehicles Notice: If you tow your vehicle with all four wheels on the ground, the drivetrain components could be damaged. The repairs would not be covered by your warranty. Do not tow your vehicle with all four wheels on the ground. Two-wheel-drive vehicles should not be towed with all four wheels on the ground. Two-wheel-drive transmissions have no provisions for internal lubrication while being towed. To properly tow these vehicles, they should be placed on a platform trailer. Four-Wheel-Drive Vehicles Four-wheel-drive vehicles can be dinghy towed if you follow the proper procedures. The transmission has no provisions for internal lubrication while being towed, so it is important that you follow all the steps listed in this manual to dinghy tow your four-wheel-drive vehicle. 356