Black plate (4,1)
DURAMAX Diesel Engine (LML/LGH) - 2011
11-4
Service and Maintenance
.
Lubricate the front suspension,
steering linkage, rear driveline
center splines (van models),
and parking brake cable guides.
Control arm ball joints on pickup
models require lubrication but
should not be lubricated unless
their temperature is
−
12°C
(10°F) or higher, or they could
be damaged. Vehicles used
under severe commercial
operating conditions require
lubrication on a regular basis
every 5 000 km/3,000 miles.
.
Body component lubrication.
Lubricate all key lock cylinders,
body door hinges, hood latch
assembly, secondary latch,
pivots, spring anchor, release
pawl, fuel door hinge, locks,
latches, and any folding or
moving seat hardware. Pickup
models: Lubricate tailgate
hinges, tailgate linkage, tailgate
handle pivot points, and latch
bolt. Van models: Lubricate hood
hinges and rear compartment
hinges. See
Recommended
Fluids and Lubricants on
page 11
‑
8
. More frequent
lubrication may be required
when the vehicle is exposed to
a corrosive environment.
Applying silicone grease on
weatherstrips with a clean cloth
makes them last longer, seal
better, and not stick or squeak.
.
Restraint system component
check. See
“
Safety System
Check
”
in the owner manual.
.
Fuel system inspection for
damage or leaks.
.
Exhaust system, including DPF
pressure lines, and nearby heat
shields inspection for loose or
damaged components. Check to
be sure that mud or dirt is not
caked on the exhaust system,
especially in the area of the
diesel particulate filter and
tailpipe. Clean the area as
needed. See
Diesel Particulate
Filter (Exhaust Filter) on
page 9
‑
10
. At high mileages,
the DPF becomes loaded with
ash. This is normal. When the
amount of ash loading is high,
see your dealer for DPF
cleaning or replacement.
.
For vehicles with Allison
Transmission
®
only: At the first
engine oil change only, replace
external transmission filter.
.
Vans with GVWR above 4 536 kg
(10,000 lbs) and all pickups:
Shields inspection for damage
or looseness. Adjust or replace
as required. This is a Noise
Emission Control Service.
Applicable to vehicles sold in the
United States and recommended
for vehicles sold in Canada.
.
Air intake system check.
Check the air intake system
installation to assure that
gaskets are properly sealed
and that all hose connections,
fasteners, and other components
are tight. Also check to be sure
that the air cleaner housing is
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