Black plate (22,1)Cadillac CTS/CTS-V Owner Manual (Include Mex) - 201210-22 Vehicle CareIf no coolant is visible in the surgetank, add coolant as follows:1. Remove the coolant surge tankpressure cap when the coolingsystem, including the coolantsurge tank pressure cap andupper radiator hose, is no longerhot. Turn the pressure capslowly counterclockwise aboutone-quarter turn and then stop.If you hear a hiss, wait for that tostop. A hiss means there is stillsome pressure left.2. Keep turning the pressure capslowly and remove it.3. Fill the coolant surge tank withthe proper mixture, to slightly above the FROID/FULL COLDline on the side of the coolantsurge tank.4. With the coolant surge tankpressure cap off, start theengine and let it run until youcan feel the upper radiator hosegetting hot. The upper radiatorhose is the top hose coming outof the radiator, on the passengerside of the vehicle. Watch out forthe engine cooling fans.By this time, the coolant levelinside the coolant surge tankmay be lower. If the level islower, add more of the propermixture to the coolant surge tankuntil the level reaches theFROID/FULL COLD line on theside of the coolant surge tank.5. Replace the pressure cap.Be sure the pressure cap ishand-tight and fully seated.Notice: If the pressure cap is nottightly installed, coolant loss andpossible engine damage mayoccur. Be sure the cap is properlyand tightly secured.Recheck the coolant level in thebottle next time you use yourvehicle to ensure the system is fullwhen cold.
