When To Add Engine Oil - GMC TopKick 2007 Owner's Manual

2. Pull out the dipstick and clean it with a
paper towel or a cloth, then push it back in
all the way.
3. Remove the dipstick again, keeping the tip
down, and check the oil level.
6.6L V8 DURAMAX
Isuzu 6H Engine
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Engine

When to Add Engine Oil

If the oil is below the cross-hatched area at the tip
of the dipstick for the 6.6L V8 DURAMAX
you will need to add at least two quarts/liters of oil.
If the oil is below the lower hole at the tip of the
dipstick for the Isuzu 6H engine, you will need to
add at least one quart/liter of oil. But you must use
the right kind. This section explains what kind of oil
to use. For engine oil crankcase capacity, see
Capacities and Specifications on page 348.
Notice: Do not add too much oil. If the engine
has so much oil that the oil level gets above the
cross-hatched area for the 6.6L V8 (LLY) engine
or above the upper hole that shows the proper
operating range for the 7.8L L6 (LG4) engine,
the engine could be damaged.
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engine,
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