GMC Sierra Denali Classic 2007 Owner's Manual page 355

CAUTION:
{
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.
The coolant level should
be at or above the FULL
COLD mark. If it is not,
you may have a leak at
the pressure cap or in
the radiator hoses,
heater hoses, radiator,
water pump or
somewhere else in the
cooling system.
If your vehicle is equipped with an electric engine
cooling fan, check the coolant temperature
gage. If the coolant temperature is approximately
232°F (111°C), the electric cooling fan should
be running. If it is not, your vehicle needs service.
Turn off the engine.
If your vehicle is equipped with an engine-driven
cooling fan, start the engine again and see if the 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. See Overheated Engine Protection
Operating Mode on page 353 for information on
driving to a safe place in an emergency.
Notice: Using coolant other than DEX-COOL
may cause premature engine, heater core or
radiator 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 (silicate-free) coolant in your
vehicle.
®
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