GMC TopKick 2007 Owner's Manual page 100

The following tips will help you get good starting in
cold weather.
•
Use the recommended engine oil when the
outside temperature drops below freezing.
See Engine Oil (Caterpillar
page 264 or Engine Oil (Gasoline Engine)
on page 265 or Engine Oil (DURAMAX
Diesel Engine) on page 268. When the
outside temperature drops below 0°F (−18°C),
use of the optional engine coolant block
heater is recommended.
•
If you experience longer cranking times, notice
an unusual amount of exhaust smoke or are
at higher altitudes (over 7,000 ft. or 2 135 m),
you may use your optional engine coolant
block heater. See Engine Coolant Heater on
page 108.
•
See What Fuel to Use on page 249 for
information on what fuel to use in cold
weather.
100
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Diesel Engine) on
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/Isuzu
Cold Weather Starting
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(Caterpillar Diesel)
Because the diesel engine uses compression
ignition, it is harder to start in cold weather than a
gasoline engine. The air intake heater and use
of the proper engine oil, optional engine coolant
heaters and optional ether injection systems
help cold weather starting. See the Caterpillar
Diesel Engine Operation & Maintenance Manual
for more information.
Restarting the Diesel Engine While
Moving (Automatic Transmission)
If you have to restart the engine while the vehicle is
moving, you will first have to shift to NEUTRAL (N).
This safety feature prevents starting the engine
when the transmission is in a drive gear for more
information.
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