2003 Oldsmobile Alero Owner's Manual - Page 248

. . 2. Then keep turning the pressure cap slowly, and remove it. 1. Park the vehicle on a level surface. You can remove the coolant surge tank pressure cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly tn r n t n r t - l n t - b t n r i c n - n "wL4,nb-,"#-U,\"",.J- /loft\ \ ' U t L , U ghnt U V U It L h r r n nr t \ A r n L l l V VI ,""V U I I U Qnrl one-half turns. If you hear a hiss, wait for that to stop. This will allow any pressure still left to be vented out the discharge hose. 5-33