Black plate (15,1)
DURAMAX Diesel Engine (LML/LGH) - 2011
Vehicle Care
10-15
Notice:
Too much or too
little fluid can damage the
transmission. Too much can
mean that some of the fluid could
come out and fall on hot engine
parts or exhaust system parts,
starting a fire. Too little fluid
could cause the transmission to
overheat. Be sure to get an
accurate reading if checking the
transmission fluid.
Wait at least 30 minutes before
checking the transmission fluid level
if the vehicle has been driven:
.
When outside temperatures are
above 32° C (90°F).
.
At high speed for quite a while.
.
In heavy traffic
—
especially in
hot weather.
.
While pulling a trailer.
To get the right reading, the fluid
should be at normal operating
temperature, which is 82°C to 93°C
(180°F to 200°F). Get the vehicle
warmed up by driving about
24 km (15 miles) when outside
temperatures are above 10°C
(50°F). If it is colder than 10°C
(50°F), drive the vehicle until the
engine temperature gauge moves
and then remains steady for
10 minutes.
A cold check can be made after
the vehicle has been sitting for
eight hours or more with the engine
off, but this is used only as a
reference. Let the engine run at
idle for five minutes if outside
temperatures are 10°C (50°F) or
more. If it is colder than 10°C
(50°F), the engine may have to idle
longer. Should the fluid level be low
during this cold check, the fluid must
be checked when hot before adding
fluid. Checking the fluid hot will give
you a more accurate reading of the
fluid level.
Checking the Fluid Level
Prepare the vehicle as follows:
.
Park the vehicle on a level
place. Keep the engine running.
.
With the parking brake applied,
place the shift lever in P (Park).
.
With foot on the brake pedal,
move the shift lever through
each gear range, pausing for
about three seconds in each
range. Then, position the shift
lever in P (Park).
.
Let the engine run at idle for
three minutes or more.
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