GMC Yukon Denalid Owner's Manual page 453

Notice: Engine damage from running your
engine without coolant is not covered by your
warranty. See Overheated Engine Protection
Operating Mode on page 450 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.
How to Add Coolant to the Coolant
Surge Tank
If you have not found a problem yet, check to see
if coolant is visible in the surge tank. 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
at the coolant surge tank, but be sure the
cooling system, including the coolant surge tank
pressure cap, is cool before you do it. See Engine
Coolant on page 445 for more information.
®
coolant
453