2002 Cadillac DeVille Owner's Manual - Page 338

Adding Coolant If you need more coolant, add the proper DEX-COOLR coolant mixture at the surge tank, but only when the engine is cool. Surge Tank Pressure Cap NOTICE: The surge tank cap is a 18 psi (124 kPa) pressure-type cap and must be tightly installed to prevent coolant loss and possible engine damage from overheating. Be sure the arrow on the cap lines up with the overflow hose. See "Engine Compartment Overview" in the Index 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. Don't spill coolant on a hot engine. When replacing the pressure cap, make sure the arrow lines up with the tube. 6-28