American Autowire 510540 Pontiac GTO 1968-1972

American Autowire 510540 Classic Update Series wiring systems power up your classic ride! Modifying your classic with modern amenities is beyond the capabilities of OE wiring. American Autowire Classic Update Series wiring harnesses let you keep the classic looks and enjoy power accessories like air conditioning, windows, and fuel injection.

Kits are year/make/model-specific for a professional fit and are offered in over 25 different applications. Modifying your classic has never been easier! Upgrade your classic and muscle cars with USA-made American Autowire kits!

Kit Includes:


The 1968-1972 Pontiac GTO Kit boasts 14 features making it the most complete system of its type in the industry including:

1. A replacement headlight switch with internal 30amp circuit breaker, retention collar nut, adjustable length shaft, and custom knob.

2. Standard turn signal and hazard flashers are mounted on fuse panel. A new horn relay is mounted on the main dash harness.

3. Fuse box designed to fit in original location with no modifications. 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.

4. Original switch connector bodies – an American Autowire exclusive feature

5. Steering column connectors can plug directly into most aftermarket steering columns or stock 1968-72 GM columns that use stock GM turn signal switches.

6. Accommodates 1968 and 69 models with the factory front cornering lamp option.

7. Separate under dash courtesy lamps for use along with your original dome/interior lighting.

8. Instrument Cluster wiring is designed with a “cluster harness disconnect” system for easy service and assembly. Original terminals and PC board connector (another American Autowire exclusive) are provided for stock cluster connections. The system will also connect into most popular aftermarket gauges such as AUTOMETER, CLASSIC INSTRUMENTS, DAKOTA DIGITAL, STEWART WARNER, VDO and others.

9. Rear body harness assembly plugs into the main harness in the stock location and our longer leads allow for stock or custom routing of the wires. Rear body wiring includes backup light lead wires (with correct lamp sockets for 1969) or connectors, stop and tail light lead wires (with correct lamp sockets for 1969) or connectors, lamp sockets and leads for rear side markers (1968 and 69), terminals and connectors to mate with the license plate connection wire, and fuel tank sender wire with trunk grommet and tank connection. (1970-72 tail lamp bucket harnesses are available separately)

10. New floor dimmer switch is provided for ease of installation. Wire length and connection accommodate original floor mount dimmer switch.

11. GM bulkhead connectors for the engine and front light wiring are included (another American Autowire exclusive) and allow for easy installation with original or custom routing.

12. Engine wiring includes connectors for original points type as well as H.E.I. distributors. Power and tach connectors supplied for GM H.E.I. distributors. Alternator connectors are supplied for GM “SI” series internally regulated alternators. GM “CS” series alternator adapter is available separately.

13. Front lighting includes extra long leads that can be routed for stock or optional appearances. All headlight, parking and directional light connectors and terminals are provided along with a switched trigger wire for an electric fan relay (usually recommended with AC).

14. Original molded front parking lamp connections for the 1968-70 models (an American Autowire exclusive)