Black plate (7,1)
DURAMAX Diesel Engine (LML/LGH) - 2011
Service and Maintenance
11-7
.
Four
‐
wheel drive pickup models
only: Transfer case fluid change
(severe service) for vehicles
mainly driven when frequently
towing a trailer, or used for taxi,
police, or delivery service.
Check vent hose at transfer
case for kinks and proper
installation. Check to be sure
vent hose is unobstructed, clear,
and free of debris. During any
maintenance, if a power washer
is used to clean mud and dirt
from the underbody, care should
be taken to not directly spray
the transfer case output seals.
High pressure water can
overcome the seals and
contaminate the transfer case
fluid. Contaminated fluid will
decrease the life of the transfer
case and should be replaced.
First Engine Oil Change After
Every 160 000 km/100,000 Miles
.
Van Models: Automatic
transmission fluid and filter
change (normal service). See
Automatic Transmission Fluid on
page 10
‑
11
.
.
Four
‐
wheel drive pickup
models only: Transfer case fluid
change (normal service). Check
vent hose at transfer case for
kinks and proper installation.
Check to be sure vent hose is
unobstructed, clear, and free of
debris. During any maintenance,
if a power washer is used to
clean mud and dirt from the
underbody, care should be taken
to not directly spray the transfer
case output seals. High pressure
water can overcome the seals
and contaminate the transfer
case fluid. Contaminated fluid
will decrease the life of the
transfer case and should be
replaced.
First Engine Oil Change After
Every 240 000 km/150,000 Miles
.
Engine cooling system drain,
flush, and refill (or every
five years, whichever occurs
first). See
Engine Coolant on
page 10
‑
21
.
An Emission
Control Service.
.
Engine drive belts inspection
for fraying, excessive cracks,
or obvious damage (or every
10 years, whichever occurs
first). Replace, if needed.
