2004 Chevrolet Silverado 1500 4.3 Fuse Box Diagram 2004 Chevrolet Silverado 1500 4.3 Fuse Box Diagram 2004 Chevrolet Silverado 1500 4.3 Fuse Box Map Fuse Panel Layout Diagram Parts: high speed GMLAN serial data, DLC class 2 serial data, ground, battery positive voltage.