Buick GS 400 Wiring Harnesses & Electrical - OEM-Fit Harnesses & Components
Restore your Buick GS 400’s electrical system with precision-engineered wiring harnesses and electrical components designed specifically for your vehicle. Each harness is manufactured to match the original routing, connectors, and circuits of your Buick GS 400—restoring the wiring behind the dash, under the hood, and through the body to factory-correct, or factory-improved, condition.
Our Buick GS 400 electrical lineup includes complete wiring harness sets, battery cables and ground straps, switches, electrical devices, and update/conversion products such as alternator upgrades and electronic ignition conversions. Every component is manufactured and tested to deliver dependable, factory-correct performance, and is organized by your vehicle’s exact year to ensure the harness or component you order is the one built for your Buick GS 400—not a close approximation.
Use the Vehicle Selector above to find the correct wiring or electrical component for your Buick GS 400, or browse below to explore available options. Whether you’re chasing judging points with a numbers-matching restoration or simply getting your Buick GS 400 running right, Factory Interiors makes it easy to restore your electrical system with wiring products proudly made in the USA.
adapts "T" shaped motor connector to side by side blade type motor connector
rear speaker, (wiring from rear speaker wire to speaker) Use when installing replacement or aftermarket speakers. Made with correct connector for hook-up to current GM replacement speaker and correct connector for connection to original wiring, or cut off connector for hook-up to current GM replacement speaker and solder wires directly to aftermarket speaker.
1967-1968 Buick GS 400 Steering Column Turn Signal Switch Adapter Harness, built to original specification.
- Choose your exact application from the options above
- Each option lists the equipment and fitment it covers
Flaming River or 1977 & later GM column to stock Dash Harness, Note: Adapts horn, directionals, 4 way flashers, & ignition key warning of column to stock 1969-72 dash connector
use with 700R4 or 2004R automatic trans. EXCEPT 4L60E or 4L80E. Completely externally installed kit allows for automatic operation of the torque converter lock-up (overdrive) without installing the computer!!!! Kit includes instructions.
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