Enhance your Chevrolet GMC 3500 truck with high-quality safety, air, and electrical parts from 4 State Trucks. From 7-foot custom wiring harnesses to 4-way flat to 7-way RV blade adapters, and die-cast metal 6-way connectors, we have it all. Ensure your truck's performance and reliability with our top-notch parts and accessories made fit for your truck.