Saturn 2007 Vue Owner's Manual page 340

1. 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 counterclockwise
about one-quarter of a turn.
If you hear a hiss, wait for that to stop.
This will allow any pressure still left to be
vented out the discharge hose.
2. Then keep turning the pressure cap slowly,
and remove it.
340
3. Fill the coolant surge tank with the proper
®
DEX-COOL coolant mixture, to the COLD
FILL line.