SilveradoSierra • 2013 Wiring Diagrams : Electrical Apr 26, 20132013 Wiring Diagrams. Chevy Truck Forum | Silverado Sierra GMC Truck Forums. 2013 Wiring Diagrams. Apr 26 2013, 6:09am. How much is similar or the same into the 2014 model? Any pdf like this available for us 2014 Silverado 1500 owners? Just curious. Thanks Re: 2013 Wiring Diagrams. Nov 09 2014, 4:00am 2013 Chevrolet Silverado Trailer Wiring | etrailer Fastest shipping available and a lowest price 2013 Chevrolet Silverado trailer wiring guarantee. Expert lifetime technical support on all purchases. Complete 2013 Chevrolet Silverado Trailer Wiring installation instructions and customer reviews. Call 800-298-8924 to place your order or order online at etrailer.