2008 Chevrolet Avalanche Owner's Manual - Page 377

Adding Coolant If more coolant is needed, add the proper DEX-COOL® coolant mixture at the surge tank, but only when the engine is cool. 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 5-14 for more information on location. {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. Engine Overheating There is a coolant temperature gage on your vehicle's instrument panel. See Engine Coolant Temperature Gage on page 3-39. In addition, ENGINE OVERHEATED STOP ENGINE, ENGINE OVERHEATED IDLE ENGINE, and a ENGINE POWER IS REDUCED message comes on in the Driver Information Center (DIC) on the instrument panel. See DIC Warnings and Messages on page 3-55. 5-27