To find them, you'll need to do the following:
1. Consult your owner's manual: This is the best source of information. It should have diagrams showing the location of all fluid drain points.
2. Look under the vehicle: With the vehicle on level ground, get under it. The radiator drain is typically located at the bottom of the radiator, usually a small petcock or plug near a lower corner. It may be plastic or metal. The engine block drain plug is usually a bolt located at the lowest point of the engine block itself. This often requires a socket wrench. Be aware that you'll likely need a drain pan to catch the coolant.
3. Look for markings: The drain plugs or petcocks may have some marking indicating their purpose (like a coolant symbol).
4. Online resources: Websites like Chevrolet forums or repair manuals specific to your 1999 Suburban (and specifying the engine size) may have pictures or discussions of drain locations. Be sure to verify the information with several sources.
Important Considerations:
* Coolant is HOT: Let the engine cool completely before attempting to drain the coolant. Hot coolant can cause serious burns.
* Protective gear: Wear gloves and eye protection when working with coolant.
* Coolant is toxic: Dispose of used coolant properly according to local regulations. Don't pour it down the drain or on the ground.
* Engine size matters: The location of the drains can vary significantly depending on the engine installed in your Suburban.
Without knowing your exact engine, I cannot give precise locations. Using the steps above is the most reliable way to find them safely and accurately.
