2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 292

10-22 Vehicle Care If coolant is needed, add the proper DEX-COOL coolant mixture at the coolant recovery tank. How to Add Coolant to the Recovery Tank for Gasoline Engines If the vehicle has a diesel engine, see "How to Add Coolant to the Coolant Recovery Tank" under "Van Models" in the Cooling System section of the Duramax diesel supplement for the proper coolant fill procedure. { WARNING Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the surge tank pressure cap - even a little - they can come out at high speed. Never turn the cap when the cooling system, including the surge tank pressure cap, is hot. Wait for the cooling system and surge tank pressure cap to cool if you ever have to turn the pressure cap. If coolant is needed, add the proper mixture directly to the radiator, but be sure the cooling system is cool before this is done. How to Add Coolant to the Radiator If the vehicle has a diesel engine, see "How to Add Coolant to the Radiator" under "Van Models" in the Cooling System section of the Duramax diesel supplement for the proper radiator fill procedure. { WARNING You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Do not spill coolant on a hot engine. Notice: This vehicle has a specific coolant fill procedure. Failure to follow this procedure could cause the engine to overheat and be severely damaged. { WARNING An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.