1. The vehicle owner's manual: The owner's manual for your truck should include a section on maintenance and repairs, which may include a diagram of the rear brakes.
2. Online automotive repair manuals: Many websites offer online automotive repair manuals that include diagrams and instructions for specific vehicle models. Some popular websites for repair manuals include Chilton, Haynes, and AutoZone.
3. Truck forums: Online forums dedicated to Chevy trucks may have threads or discussions that include diagrams or information about the rear brakes. You can search for these forums using a search engine or by visiting websites like Reddit or GM Truck Forums.
4. Local auto parts stores: Some local auto parts stores may have printed repair manuals or diagrams available for purchase. You can visit your local auto parts store and inquire about whether they have any information available for your truck.
5. The truck dealership: You can also contact the dealership where you purchased your truck or another authorized Chevy dealership and ask if they have a diagram of the rear brakes available. They may be able to provide you with the information you need.