2007 Pontiac Solstice Owner's Manual - Page 260

Adding Coolant If you need more coolant, add the proper DEX-COOL® coolant mixture at the coolant surge tank, but only when the engine is cool. If the coolant surge tank is empty, a special fill procedure is necessary. See Engine Overheating on page 260 for instructions on "How to Add Coolant to the Coolant Surge Tank." Coolant Surge Tank Pressure Cap Notice: If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured. The coolant surge tank pressure cap must be fully installed on the coolant surge tank. See Engine Compartment Overview on page 244 for more information on location. {CAUTION: Engine Overheating 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. There is an engine coolant temperature warning light on your vehicle's instrument panel. See Engine Coolant Temperature Warning Light on page 137 for more information. 260