2003 Buick Rendezvous Owner's Manual - Page 339

Cooling System When you decide it's safe to lift the hood, here's what you'll see: An electric engine cooling fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan. If the coolant inside the coolant recovery tank is boiling, don't do anything else until it cools down. The vehicle should be parked on a level surface. A. Radiator Pressure Cap B. Electric Engine Cooling Fans C. Coolant Recovery Tank 5-28