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Hood Latches
To tilt the hood forward, pull back and up on each of the
hood latches, located above the wheel wells on both
sides of the vehicle.Then take the hand hold and pull the hood forward.
When you tilt the hood far enough, there are cables that
will support it. When you close the hood, make sure
both latches are secured.
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Engine Oil (DURAMAX Diesel
Engine)
Checking Engine Oil
It is a good idea to check the engine oil level every time
you get fuel.
The engine oil dipstick is
located in the engine
compartment on the driver
side of the vehicle.In order to get an accurate reading, the engine should
be at normal operating temperature, so that the oil
is warm, and the vehicle must be on level ground.
1. If the engine is at normal operating temperature and
the oil is warm, turn off the engine and allow at
least five minutes for the oil to drain back into the
oil pan. If you do not do this, the oil dipstick
might not show the actual level.
If the engine has not been run long enough to bring it
up to normal operating temperature and the oil is
cool, turn off the engine and allow 30 minutes for the
oil to drain back into the oil pan. If you do not do this,
the oil dipstick might not show the actual level.
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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.
When to Add Engine Oil
If the oil is below the cross-hatched area at the tip
of the dipstick, add at least two quarts/liters 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.
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.Add oil at the engine oil fill
cap in the engine
compartment. Install and
fully tighten the fill cap
when you are through.
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.
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What Kind of Engine Oil to Use
Look for three things:
•CJ-4
Oils designated as API CJ-4 are required for the
vehicle. The CJ-4 designation can appear either alone
or in combination with other American Petroleum
Institute (API) designations, such as API CJ-4/SL.
These letters show API levels of quality.
•SAE 15W-40
SAE 15W-40 is best for the vehicle. When it is very
cold, below 0°F (−18°C), use SAE 5W-40 to improve
cold starting. These numbers on the oil container
show its viscosity, or thickness. Do not use other
viscosity oils such as SAE 10W-30, SAE 10W-40, or
SAE 20W-50.
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•American Petroleum Institute (API) symbol
This doughnut-shaped logo
(symbol) is used on most
oil containers to help you
select the correct oil. It
means that the oil has been
certified by the American
Petroleum Institute.
Look for this on the oil container, and use only
those oils that display this logo.
Notice:Use only engine oils that have the
designation CJ-4 for the diesel engine. Failure to
use the recommended oil can result in engine
damage not covered by the vehicle warranty.Engine Oil Additives
Do not add anything to the oil. The recommended oils
with the API service symbol are all you need for
good performance and engine protection.
When to Change Engine Oil (Vehicles
Without the Engine Oil Life System)
Change the engine oil and filter every 15,000 miles
(24 000 km), or every 12 months, or every 750 hours of
engine operation, whichever occurs first. See
Scheduled Maintenance on page 6-5.
Engine Oil (Caterpillar Diesel
Engine)
See the Caterpillar®Operation & Maintenance Manual
for information on oil quality and viscosities as well
as the temperature range chart.
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Page 230 of 376

Engine Oil (Isuzu Diesel Engine)
Checking Engine Oil
It is a good idea to check the engine oil level every time
you get fuel.
The engine oil dipstick is
located in the engine
compartment on the driver
side of the vehicle.In order to get an accurate reading, the engine should
be at normal operating temperature, so that the oil
is warm, and the vehicle must be on level ground.
1. If the engine is at normal operating temperature and
the oil is warm, turn off the engine and allow at
least five minutes for the oil to drain back into the
oil pan. If you do not do this, the oil dipstick
might not show the actual level.
If the engine has not been run long enough to bring
it up to normal operating temperature and the oil
is cool, turn off the engine and allow 30 minutes for
the oil to drain back into the oil pan. If you do
not do this, the oil dipstick might not show the actual
level.
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.
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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, seeCapacities and
Specifications on page 5-102.
Add oil at the engine oil fill
cap in the engine
compartment. Install and
fully tighten the fill cap
when you are through.
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.
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What Kind of Engine Oil to Use
Look for three things:
•CJ-4
Oils designated as API CJ-4 are required for the
vehicle. The CJ-4 designation can appear either alone
or in combination with other American Petroleum
Institute (API) designations, such as API CJ-4/SL.
These letters show API levels of quality.
•SAE 10W-40 or SAE 15W-40
SAE 10W-40 or SAE 15W-40 is best for the
vehicle. When it is very cold, below 0°F (−18°C), use
SAE 5W-40 to improve cold starting. These numbers
on the oil container show its viscosity, or thickness.
Do not use other viscosity oils such as SAE 10W-30
or SAE 20W-50.
5-30