Where is the coolant drain plug located on GMC truck?

The location of the coolant drain plug on a GMC truck varies significantly depending on the year, model, and engine type. There's no single answer.

To find it, you'll need to:

1. Consult your owner's manual: This is the most reliable source. It will show a diagram of your specific engine and highlight the drain plug's location.

2. Look under the vehicle: The drain plug is usually located at the lowest point of the engine block or radiator. It's often a bolt or a plug near the bottom of the engine, sometimes near a transmission cooler line or oil pan. Be careful when looking underneath, as it's hot when the engine is running.

3. Search online for your specific vehicle: Search for "[Your GMC Truck Year, Model, Engine] coolant drain plug location" on Google, YouTube, or a car repair forum. You'll likely find pictures or videos showing the location.

Safety First: Before attempting to drain coolant, let the engine cool completely to prevent burns. Wear appropriate safety glasses and gloves.