For those who think Chevrolet/GMC left room for improvement, we offer the custom way to update your 1983-87 wiring!

1983-87 Chevrolet / GMC Truck
Classic Update Series™ Wiring System (Part # 510706)

Look at everything that's included in this wiring kit!
Detailed instruction sheets also included, but not shown.
(click image to enlarge)

This is one of the most complete wiring systems in the industry.  Take a look at the numerous items and features it contains, including:

• A replacement headlight switch with internal 25-amp circuit breaker, adjustable length shaft, and custom knob.
• Standard turn signal flasher, hazard flasher, and horn relay mounted on harness.
• Fuse block designed to fit in original location with no modifications to the firewall. All required hardware supplied. New ATO fuse panel allows for easy fuse and circuit breaker accessibility. Harness is laid out, and formed to allow for nearly all after market accessories such as: gauge packages, wiper systems, heat and air-conditioning systems, etc.
• Steering column connectors can plug directly into most aftermarket steering columns or a stock 1975 and up GM column. Can also be mated to earlier columns using the adapter and terminals included in the kit.
• Separate under-dash courtesy light assemblies are also included for use along with your original dome/interior lighting feeds.
• Instrument cluster wiring is designed with a “cluster harness disconnect” system for easy service and assembly. Original terminals and connector that will plug into the original gauge cluster, are also provided. The system will also connect into most popular aftermarket gauges such as DAKOTA DIGITAL™, CLASSIC INSTRUMENTS™, AUTOMETER™, VDO™, and others.
• Rear body harness assembly plugs into the main harness at the main bulkhead disconnect location.  Our longer leads allow for stock or custom routing of the wires. Rear body wiring includes backup light lead wires and connectors, along with stop and tail light lead wires and connectors. License plate lamp lead connection, as well as the fuel tank sender lead connection, are also included.
• Original style light sockets and side markers for fleet side and original style molded connections for step side rear lights, are included.
• Engine wiring includes feeds for the coil, tachometer, water temperature, oil pressure, electric choke, and electric speedometer (if needed). A heavy gauge alternator feed and fusible link are also included for any typical high output 1-wire or internally regulated alternator. Connectors supplied for power and tachometer leads for a GM style H.E.I. distributor, along with various oil and temperature senders.
• Front lighting includes extra long leads that can be routed for stock or optional appearances. All head light, parking light, and directional light leads.
• New parking lgiht sockets and side marker light sockets, are also included.
• Switched trigger wire for an electric fan relay (usually recommended with AC), are provided.
• Mating terminals and connectors are also provided for you to complete your custom installation.
• Supports both single and dual headlight models.
• Detailed color schematics and easy to understand installation instructions.

OPTIONAL PACKAGES can be added to this system, depending on your requirements.

• Optional Factory Air-Conditioning Kit - Contains the wiring, terminals, and connectors that allow for the use of an original A/C system. - Part # 510712
• Optional Terminal Crimping Tool Set. - Part # 93963818

Some optional packages may not be available for all year/model vehicles. See catalog for more details.