2008 Saturn Astra Owner's Manual - Page 204
2008 Saturn Astra Manual
Page 204 highlights
9-14 Vehicle Service and Care Checking Coolant { CAUTION Turning the coolant reservoir pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn you badly. Never turn the coolant reservoir pressure cap - even a little - when the engine and radiator are hot. Adding Coolant If you need more coolant, add the proper DEX-COOL® coolant mixture at the coolant reservoir, but only when the engine is cool. If the coolant reservoir is empty, a special fill procedure is necessary. See Cooling System on page 9-16 for instructions on "How to Add Coolant to the Coolant Reservoir." { CAUTION 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. When replacing the pressure cap, make sure it is hand-tight and fully seated. The coolant reservoir is located in the engine compartment on the driver's side of the vehicle. See Engine Compartment Overview on page 9-6 for more information on location. The vehicle must be on a level surface. When your engine is cold, the coolant level should be at the KALT/COLD line. Do not overfill the coolant reservoir. Too much coolant can result in an overflow condition when the fluid is hot.