2010 GMC Savana 2500 Cargo Owner's Manual - Page 292

How to Add Coolant to the Radiator If your 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: 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. { 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. 6-30