Where is the resivoir on a Pontiac GrandPrix 2005?

The reservoir for the coolant on a 2005 Pontiac Grand Prix is located under the hood, on the driver's side, near the front of the engine compartment. It is a translucent plastic tank marked with "Coolant" or a similar label. The reservoir is connected to the radiator and allows for the expansion and contraction of coolant as the engine heats up and cools down. Always check the level when the engine is cool to avoid burns.