How do you install rear drum brakes on a 1994 Chevy G20 van?

To install rear drum brakes on a 1994 Chevy G20 van, first, ensure the vehicle is securely lifted and supported. Remove the rear wheels and brake drum by loosening the retaining screws if present. Replace the brake shoes, ensuring to position the springs and adjusters correctly, then reinstall the drum. Finally, reattach the wheels, lower the vehicle, and pump the brake pedal to ensure proper brake engagement before driving.