2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 370

9-86 . Driving and Operating Driving with a Trailer WARNING (Continued) . Do not tow a trailer at all during the first 800 km (500 miles) the new vehicle is driven. The engine, axle, or other parts could be damaged. During the first 800 km (500 miles) that a trailer is towed, do not drive over 80 km/h (50 mph) and do not make starts at full throttle. This helps the engine and other parts of the vehicle wear in at the heavier loads. Vehicles can tow in D (Drive). Shift the transmission to a lower gear if the transmission shifts too often under heavy loads and/or hilly conditions. { WARNING When towing a trailer, exhaust gases may collect at the rear of the vehicle and enter if the liftgate, trunk/hatch, or rear-most window is open. Engine exhaust contains Carbon Monoxide (CO) which cannot be seen or smelled. It can cause unconsciousness and even death. To maximize safety when towing a trailer: . . Fully open the air outlets on or under the instrument panel. Adjust the Climate Control system to a setting that brings in only outside air and set the fan speed to the highest setting. See Climate Control System in the Index. . . For more information about Carbon Monoxide, see Engine Exhaust on page 9‑40. Towing a trailer requires a certain amount of experience. The combination you are driving is longer and not as responsive as the vehicle itself. Get acquainted with the handling and braking of the rig before setting out for the open road. Important considerations that have to do with weight: ... Have the exhaust system inspected for leaks and make necessary repairs before starting a trip. Never drive with the liftgate, trunk/hatch, or rear-most window open. (Continued) Weight of the trailer Weight of the trailer tongue Weight on the vehicle's tires Weight of the trailering combination .