GMC 2006 DURAMAX Manual page 71

CAUTION:
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Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them. If
you do, you can be burned.
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine fire, and you could be
burned. Get any leak fixed before you drive the
vehicle.
If there seems to be no leak, start the engine again. See if
the engine cooling fan speed increases when idle speed
is doubled by pushing the accelerator pedal down. If it
does not, your vehicle needs service. Turn off the engine.
Notice: Engine damage from running your engine
without coolant is not covered by your warranty.
Notice: Using coolant other than DEX-COOL
cause premature engine, heater core, radiator and
fuel operated heater (FOH) corrosion. In addition,
the engine coolant may require changing sooner, at
30,000 miles (50 000 km) or 24 months, whichever
occurs first. Any repairs would not be covered by
your warranty. Always use DEX-COOL
coolant in your vehicle.
How to Add Coolant to the Coolant
Surge Tank
Notice: The diesel engine has a specific coolant fill
procedure. Failure to follow this procedure could
cause your engine to overheat and be severely
damaged.
If you have not found a problem yet, but the coolant level
is not at the COLD FILL mark, add a 50/50 mixture of
clean, drinkable water and DEX-COOL
at the coolant surge tank. See Engine Coolant on
page 5-34 for more information.
®
may
®
(silicate-free)
®
engine coolant
5-47