Chevrolet 2009 Kodiak Owner's Manual page 231

When to Add Engine Oil
Notice: Do not add too much oil. Keep the oil level
between the ADD (C) and FULL (B) marks on the
dipstick. Under normal engine operation, the engine
oil level can increase above the FULL (B) mark as
a result of DPF regeneration. A small increase in the
oil level is normal. If the engine has so much oil
that the oil level reaches the wider portion (A) on the
dipstick, the engine oil must be changed as soon
as possible or the engine could be damaged.
If the oil is below the ADD
mark (C) on 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 5-102.
Add enough oil to put the level somewhere in the proper
operating range. Push the dipstick all the way back in
when you are through.
Add oil at the engine oil fill
cap in the engine
compartment. Install and
fully tighten the fill cap
when you are through.
5-29