![background image](http://html1.mh-extra.com/html/gmc/duramax-3-0l/duramax-3-0l_supplement-manual_2235700040.webp)
Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336148) - 2020 - CRC - 9/5/19
Vehicle Care
39
the engine is not warm. Pull out
the dipstick, wipe it with a clean
paper towel or cloth, then push it
back in all the way. Remove it
again, keeping the tip down, and
check the level.
When to Add Engine Oil
If the oil is below the cross-hatched
area at the tip of the dipstick and
the engine has been off for at least
15 minutes, add 1 L (1 qt) of the
recommended oil and then recheck
the level. See
“
Selecting the Right
Engine Oil
”
later in this section for
an explanation of what kind of oil to
use. For engine oil crankcase
capacity, see
Caution
Do not add too much oil. Oil
levels above or below the
acceptable operating range
shown on the dipstick are harmful
to the engine. If the oil level is
above the operating range (i.e.,
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. Drain
the excess oil or limit driving of
the vehicle, and seek a service
professional to remove the
excess oil.
See
for the location of the engine
oil fill cap.
Be sure to add enough oil to put the
level somewhere in the proper
operating range. Push the dipstick
all the way back in when through.
Selecting the Right Engine Oil
Selecting the right engine oil
depends on both the proper oil
specification and viscosity grade.
See
.
Specification
Use engine oils that meet the
dexosD specification. Engine oils
that have been approved by GM as
meeting the dexosD specification
are marked with the dexosD
approved logo. See
www.gmdexos.com.
Caution
Failure to use the recommended
engine oil or equivalent can result
in engine damage not covered by
the vehicle warranty.