Engine Oil - GMC Duramax 3.0L Supplement Manual

38 Vehicle Care
1. Remote Negative (-) Ground
Terminal
2. Positive (+) Terminal
3. Battery
4. Engine Compartment Fuse
Block
5. Engine Oil Fill Cap
6. Engine Fan (Out of View)
7. Engine Oil Dipstick
8. Engine Coolant Surge Tank
and Pressure Cap
9. Charge Air Coolant Surge Tank
and Pressure Cap
10. Engine Air Cleaner/Filter
11. Brake Fluid Reservoir
12. Auxiliary Fuse Block
13. Windshield Washer Fluid
Reservoir

Engine Oil

To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
Use engine oil approved to the
proper specification and of the
proper viscosity grade. See
Selecting the Right Engine Oil
in this section.
Check the engine oil level
regularly and maintain the
proper oil level. See Checking
Engine Oil and When to Add
Engine Oil in this section.
Change the engine oil at the
appropriate time. See Engine
Oil Life System in the owner s
manual.
Always dispose of engine oil
properly. See What to Do with
Used Oil in this section.
Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially
prior to a long trip. The engine oil
dipstick handle is a loop. See
Engine Compartment Overview 0 37
for the location.
Warning
The engine oil dipstick handle
may be hot; it could burn you.
Use a towel or glove to touch the
dipstick handle.
If a low oil Driver Information Center
(DIC) message displays, check the
oil level.
Follow these guidelines:
To get an accurate reading, park
the vehicle on level ground.
Check the engine oil level after
the engine has been off for at
least two hours. Checking the
engine oil level on steep grades
or too soon after engine shutoff
can result in incorrect readings.
Accuracy improves when
checking a cold engine prior to
starting. Remove the dipstick
and check the level.
If unable to wait two hours, the
engine must be off for at least
15 minutes if the engine is
warm, or at least 30 minutes if