2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 289

Vehicle Care WARNING (Continued) The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/ filter off. Notice: If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when you are driving. 10-19 { WARNING Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned. Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle. Notice: Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 50 000 km (30,000 mi) or 24 months, whichever occurs first. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL (silicate-free) coolant in the vehicle. A. Radiator Pressure Cap B. Coolant Recovery Tank C. Engine Cooling Fan (Out of View) Cooling System If the vehicle has a diesel engine, see "Van Models" under "Cooling System" in the Duramax diesel supplement. The cooling system allows the engine to maintain the correct working temperature. { WARNING An electric engine cooling fan can start even when the engine is not running. To avoid injury, always keep hands, clothing, and tools away from any engine cooling fan.