Where is the radiator drain plug for a 2003 GMC Sonoma truck?

The radiator drain plug for a 2003 GMC Sonoma truck is typically located at the bottom of the radiator on the driver's side. It may appear as a small plastic or metal plug that can be turned by hand or with a tool. To drain the coolant, ensure the engine is cool, then open the drain plug to allow the coolant to flow out into a container. Always remember to properly dispose of the coolant afterward.