GMC 2010 Canyon Crew Cab Owner's Manual page 307

Checking Coolant
The vehicle must be on a level surface when checking
the coolant level.
It is located toward the rear of the engine compartment
on the passenger side of the vehicle. See Engine
Compartment Overview on page 6-12 for more
information on location.
The coolant recovery tank
cap has this symbol on it.
Check to see if coolant is visible in the coolant recovery
tank. If the coolant inside the coolant recovery 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
recovery tank, but be sure the cooling system is cool
before this is done.
The vehicle must be on a level surface. When the engine
is cold, the coolant level should be at FULL COLD, or a
little higher. When the engine is warm, the level could be
above the FULL COLD level.
When the engine is cold, the coolant level should be
at least up to the FULL COLD mark. If it is not,
there could be a leak in the cooling system.
®
coolant at the coolant
6-31