Where is the radiator drain plug in a buick regal custom?

The location of the radiator drain plug on a Buick Regal Custom varies slightly depending on the year of the vehicle. There isn't one universal spot. It's almost always located at the bottom of the radiator, but you'll need to get under the car to find it.

To locate it:

1. Consult your owner's manual: This is the best resource. It will have diagrams and specific instructions for your model year.

2. Look at the bottom of the radiator: The drain plug is usually a small, typically brass or plastic, plug or bolt. It might be on the driver's side, the passenger's side, or even in the center.

3. Look for a low point: The drain plug will be at the lowest point of the radiator to ensure complete draining.

4. Use a flashlight: It can be difficult to see under the car, especially if it's dark.

Important Note: Be prepared for hot coolant if the engine has been recently run. Allow the engine to cool completely before attempting to drain the radiator. Also, have a drain pan ready to catch the coolant.