Checking Coolant - GMC 2010 Yukon XL Denali Owner's Manual

Checking Coolant

The vehicle must be on a level surface when checking
the coolant level.
Check to see if coolant is visible in the coolant surge
tank. If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
If coolant is visible but the coolant level is not at or
above the FULL COLD mark, add a 50/50 mixture of
clean, drinkable water and DEX-COOL
coolant surge tank, but be sure the cooling system is
cool before this is done.
®
coolant at the
The coolant surge tank is located in the engine
compartment on the passenger side of the vehicle.
See Engine Compartment Overview on page 6 14
for more information on location.
The coolant level should be at or above the FULL
COLD mark. If it is not, you may have a leak in the
cooling system.
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