2010 GMC Terrain Owner's Manual - Page 296

9-22 Vehicle Care Notice: . Washer Fluid What to Use Read the manufacturer's instructions before re-filing the windshield washer fluid. If operating the vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing. When using concentrated washer fluid, follow the manufacturer's instructions for adding water. Do not mix water with ready-to-use washer fluid. Water can cause the solution to freeze and damage the washer fluid tank and other parts of the washer system. Also, water does not clean as well as washer fluid. Fill the washer fluid tank only three-quarters full when it is very cold. This allows for fluid expansion if freezing occurs, which could damage the tank if it is completely full. Do not use engine coolant (antifreeze) in the windshield washer. It can damage the vehicle's windshield washer system and paint. . Adding Washer Fluid The "Washer Fluid Low Add Fluid" message will appear on the Driver Information Center (DIC) when the fluid level is low. See Driver Information Center (DIC) on page 4‑25 for more information. Open the cap with the washer symbol on it and add washer fluid until full. See Engine Compartment Overview on page 9‑6 for reservoir location. . .