Pontiac 2003 Vibe - Manual (Page 279)

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Radiator Pressure Cap
NOTICE:
Your radiator cap is a 15 psi (105 kPa)
pressure
- type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the cap
line up with the overflow tube on the radiator
filler neck.
See “Engine Compartment Overview” in the Index for
more information on location.
Power Steering Fluid
When to Check Power Steering Fluid
It is not necessary to regularly check power steering
fluid unless you suspect there is a leak in the system or
you hear an unusual noise. A fluid loss in this system
could indicate a problem. Have the system inspected and
repaired. See “Engine Compartment Overview” in the
Index for reservoir location.
The power steering fluid
reservoir is located in the
engine compartment on
the passenger’s side of
the vehicle.