To know for sure if your specific 2002 Suburban is RWD or 4WD, you can:
* Check the VIN: The vehicle identification number (VIN) will contain information about the drivetrain.
* Look at the vehicle: Four-wheel drive Suburbans typically have a lever or button near the driver's seat for engaging 4WD.
* Check the owner's manual: The manual will specify the drivetrain configuration.