GMC Acadia 15919282 Owner's Manual page 300

5-14 Service and Appearance Care
When to Add Engine Oil
If the oil is below the cross-hatched
area at the tip of the dipstick,
add at least one quart/liter of the
recommended oil. This section
explains what kind of oil to use. For
engine oil crankcase capacity, see
Capacities and Specifications on
page 5-94.
Notice: Do not add too much oil.
If the engine has so much oil
that the oil level gets above the
cross-hatched area that shows
the proper operating range,
the engine could be damaged.
See Engine Compartment Overview
on page 5-12 for the location of
the engine oil fill cap.
Add enough oil to put the level
somewhere in the proper operating
range in the cross-hatched area.
Push the dipstick all the way back
in when through.
What Kind of Engine Oil to Use
Look for three things: