1964–1967 Chevrolet Chevelle / Malibu Wiring Harnesses (Pro-Series)
For builders who want a custom-routed, modern electrical system without sacrificing OEM reliability, the Painless Pro-Series harness is the ultimate solution. Designed for 1964–1967 Chevelle and Malibu models, this system delivers professional-grade performance for pro-touring, street-rod, or restomod applications.
Unlike traditional direct-fit kits, the Pro-Series gives you the flexibility to route wiring exactly how you want it. Each circuit includes extra length (up to 20’ to the front, 25’ to the rear) so you can conceal wiring behind panels, through the frame, or along custom paths.
Every wire is GM color-coded and printed every 12 inches, and over 25 GM-style connectors are included to adapt the harness into a direct-fit configuration once routed.
Why Choose Painless Pro-Series
Custom-length harnesses for total freedom in routing
GM color-coded, labeled wires for simple installation
Compatible with carbureted or EFI systems
Complete kit includes all connectors, terminals, and hardware
Modern LED fuses and heavy-gauge charge wire for reliability
Made in the USA with lifetime warranty and tech support
Available Configurations
Choose from four versions depending on your build style and firewall configuration:
| Circuit Count | Firewall Type | Key Location | Part Number |
|---|---|---|---|
| 23-Circuit | Grommet Pass-Through | Key in Dash | 10402 |
| 23-Circuit | Bulkhead Pass-Through | Key in Dash | 10404 |
| 25-Circuit | Grommet Pass-Through | Key in Dash | 10412 |
| 25-Circuit | Bulkhead Pass-Through | Key in Dash | 10414 |
Included Circuits
A/C & Heat • Accessory (fan relay, fuel pump) • Backup Lights • Brake Lights • Charging • Cigarette Lighter • Dome / Courtesy Lights • Electric Choke • Emergency Flashers • Fused Power Source • Headlights • Horn (Relay) • Ignition Coil • Instrument Panel Lighting & Gauges* • Park / Marker Lights • Power Windows & Door Locks (25-Circuit only) • Radio/Clock (Constant & Switched) • Relay Activation Leads • Starting • Tail & License Plate Lights • Third Brake Light • Turn Signals • Wipers
*Including wires for: Fuel Gauge, Oil Gauge, Tachometer, Temperature Gauge, Voltmeter
Pro-Series Features
Customizable Layout: Ample wire length for hidden routing and unique setups
GM Color Coding & Circuit Printing: Every wire labeled for clarity and serviceability
LED Smart Fuses: Modern ATC blade fuses light up when blown for fast troubleshooting
Heavy-Gauge Charge Wire: 6-gauge feed with 150-amp MIDI fuse for high-output alternators
Integrated Ground Harnesses: Dedicated front and rear grounding straps included
Connectors & Accessories: 25+ GM-style connectors, terminals, splices, grommets, and cable ties
Ignition Adaptability: Works with any ignition switch—GM, aftermarket, or column-mounted
Lifetime Warranty: Painless reliability backed by U.S. tech support
Firewall Options
Grommet Pass-Through (P/N 10402, 10412)
A traditional rubber-grommet design allows flexible routing and is ideal for custom firewalls or smoothed engine bays.
Bulkhead Pass-Through (P/N 10404, 10414)
Utilizes a GM-style bulkhead connector that mounts the fuse block to the inside firewall for a factory-style seal and quick engine-bay disconnection.
Perfect For
1964–1967 Chevrolet Chevelle & Malibu builds
Pro-Touring or Custom Street Cars with upgraded accessories
Restorations needing clean wire routing and modern fuse protection
LS or EFI conversions requiring high-output alternator support