Black plate (6,1)
DURAMAX Diesel Engine (LML/LGH) - 2011
11-6
Service and Maintenance
First Engine Oil Change After
Every 40 000 km/25,000 Miles
.
Pickup Models: Automatic
transmission fluid and external
filter change (severe service)
for vehicles mainly driven in
heavy city traffic in hot weather,
in hilly or mountainous terrain,
when frequently towing a
trailer, or used for taxi,
police, or delivery service.
See
Automatic Transmission
Fluid on page 10
‑
11
.
.
Four
‐
wheel drive pickup models
only: Transfer case fluid change
(extreme duty service) for
vehicles mainly driven off
‐
road
in four
‐
wheel drive. Vehicles
used for farming, mining,
forestry, Department of Natural
Resources (DNR), and snow
plowing occupations meet this
definition. 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 80 000 km/50,000 Miles
.
Engine air cleaner filter
replacement. See
Engine Air
Cleaner/Filter on page 10
‑
18
.
.
Pickup Models: Automatic
transmission fluid and filter
change (normal service).
See
Automatic Transmission
Fluid on page 10
‑
11
.
.
Van Models: Automatic
transmission fluid and filter
change (severe service) for
vehicles mainly driven in
heavy city traffic in hot weather,
in hilly or mountainous terrain,
when frequently towing a
trailer, or used for taxi,
police, or delivery service.
See
Automatic Transmission
Fluid on page 10
‑
11
.
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