When it comes to rewiring your 1955, 1956, or 1957 Chevrolet, nothing compares to the Painless Performance 27-Circuit Chassis Wiring Harness. This kit is designed specifically for all Tri-Five models: Chevy 150, 210, Bel Air, Nomad, and Wagons, and it truly covers every inch of the car. It includes every single connector and grommet you need, making it the most complete wiring solution available whether you’re tackling a bone-stock restoration or building a full-blown restomod. To make installation even easier, every wire is labeled every 12 inches and the kit comes with a full-color manual with detailed diagrams and pictures to walk you step by step through the process.

Complete Coverage for Your Tri-Five Chevy

This harness supports all factory systems and adds modern accessory circuits so your classic Chevrolet can handle today’s demands. From headlights, taillights, ignition, gauges, and dome lights to optional upgrades like power windows, power door locks, aftermarket radios, fuel pumps, and electric fans, this harness has you covered. With 27 circuits, 18 fuses, a built-in horn relay, and a maxi fuse, it’s designed to deliver both factory fitment and modern reliability.

Factory Fitment and Easy Installation

Painless designed this kit to mount in the factory fuse block location with a dedicated mounting plate. The harness length is measured for perfect fitment in every Tri-Five body style, and a grommet firewall passthrough keeps the engine bay clean and professional. The wiring uses GM color-coded TXL wire for durability, with printed circuit designations that take the guesswork out of wiring your Bel Air, 210, 150, or Nomad.

Built for Stock Restorations and Modern Restomods

Whether you want your 1957 Chevy Bel Air to look like it just rolled off the assembly line or you’re packing a 1955 Nomad with modern performance upgrades, this harness makes it possible. It seamlessly integrates with factory or aftermarket instrument clusters, supports additional accessories, and is engineered to handle the extra power needs of restomod builds.

Specifications at a Glance

• Number of Circuits: 27 Circuits / 18 Fuses with Horn Relay & Maxi Fuse

• Fitment: 1955–1957 Chevrolet 150, 210, Bel Air, Nomad, and Wagons

• Fuse Type: Blade & Midi Fuses

• Firewall Passthrough: Grommet

• Wire Type: High-grade GM color-coded TXL with printed circuit ID

• Part Number: Painless Performance 20105

The Dependable Wiring Solution for Your Classic Chevy

Rewiring a Tri-Five can be intimidating, but with Painless you’re not just buying a harness, you’re buying confidence. Every connector, every grommet, every label is designed to simplify your project so you can spend more time enjoying your Chevy and less time tracing wires. Backed by decades of experience and trusted by builders worldwide, the Painless 20105 Chassis Wiring Kit is the ultimate electrical solution for your 1955–1957 Chevrolet.