American Autowire 510333 Classic Update Wiring Harness Kit for Chevy/GMC Truck - 1967-1968

The American Autowire 510333 Classic Update Series wiring harness kit is a complete electrical system designed specifically for 1967-1968 Chevrolet and GMC trucks. This comprehensive kit provides everything needed to rewire your classic truck from headlight to tail light, with the added capability to support modern accessories and aftermarket upgrades that go beyond the capacity of original equipment wiring.

Complete System Features:

• 18-circuit design with updated ATC fuse panel and modern GXL wire throughout
• Wire functions clearly labeled every 3 to 5 inches for easy identification
• Pre-built dash harness with exclusive gauge cluster disconnect system for use with stock or aftermarket instruments
• Compatible with popular aftermarket gauges including AutoMeter, Classic Instruments, Dakota Digital, Stewart Warner, and VDO
• Engine and front light harness with extra-long leads for custom routing and updated engine/transmission combinations
• Original-style GM bulkhead connectors included for easy installation
• Six-way power accessory plug for convenient aftermarket accessory connections

Included Components:

• Replacement headlight switch with internal 30-amp circuit breaker, retention collar nut, adjustable length shaft, and custom knob
• Standard turn signal flasher, hazard flasher mounted on fuse panel, and horn relay mounted on harness
• Original terminals, connectors, and light sockets for stock cluster connections
• Connectors for both original points-type and HEI distributors, including power and tach connectors
• Alternator connectors for GM SI series internally regulated alternators
• Complete rear body harness assembly with backup lights, stop/tail lights, license plate connection, side marker leads, and fuel tank sender wire
• Separate under-dash courtesy lamps for use with original dome/interior lighting
• Full color schematics and detailed installation instructions

The Classic Update Series is specifically recommended for modified original vehicles and restomod projects, not OEM restoration. This harness accommodates popular add-on items such as electronic fuel injection, air conditioning, power windows, heat systems, and aftermarket instrument clusters. Note that firewall modification may be required for installation—see included template within installation instructions.