Our Factory Fit harnesses are concourse-level reproductions. They are built to the latest revision of the General Motors engineering blueprints, and are what you would have received from the dealership parts department when the vehicles we service were still in production. GM viewed these replacement parts as service items much like a set of brake shoes or spark plugs, so there were no installation instructions created.

Factory Fit harnesses will ship fully assembled and ready to install. They will follow the same routing as your original wiring. A factory assembly manual will also provide some insight into routing for many Factory Fit parts, and will be a "must have" item for any restoration. If you're stumped by a few connections on your new wiring, our tech support team can help you identify the function of the wires in our replacement harness.

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