Pontiac 2006 Grand Prix - Manual (Page 342)

3.2. Lift the engine cover shield at the front, slide
the catch tab out of the engine bracket and
remove the cover shield.
3.3. Put the oil fill tube, with cap attached, in the
valve cover oil fill hole until you are ready to
replace the cover shield.
4. After the engine cools,
open the coolant air
bleed valve located on
the thermostat
housing near the
heater hose.
3800 V6 Supercharged Engine
Thermostat Housing
5-36