2009 GMC Canyon Owner's Manual - Page 274

When to Check and What to Use Cooling System The cooling system allows the engine to maintain the correct working temperature. Refer to the Maintenance Schedule to determine how often to check the fluid level in the clutch master cylinder reservoir and for the proper fluid. See Recommended Fluids and Lubricants on page 6-11. 2.9L Engine shown (3.7L Engine similar) A. Coolant Recovery Tank B. Engine Cooling Fan C. Radiator Pressure Cap How to Check and Add Fluid The proper fluid should be added if the level does not reach the bottom of the diaphragm when it is in place in the reservoir. See the instructions on the reservoir cap. 5-26