1970–1972 Chevrolet Chevelle / Malibu Wiring Harness (Direct-Fit)
Finish your Chevelle project the right way with a factory-style direct-fit wiring solution built for the 1970–1972 Chevelle and Malibu. The Painless Performance 26-Circuit Harness (P/N 20130) is engineered for a true bolt-in installation that utilizes the original firewall bulkhead opening, mounts the fuse block in the OEM location, and connects directly to factory switches and components.
Every wire is GM color-coded, printed every 12 inches, and pre-terminated for a plug-and-play fit. This kit supports modern upgrades like high-output alternators, electric fuel pumps, and power accessories, all while preserving an OEM appearance under the hood and behind the dash.
Why Choose Painless Performance
Factory bulkhead fitment for true bolt-in installation
Color-coded and labeled wiring simplifies service and troubleshooting
Modern fuse block with reliable blade-style protection
Pre-wired SS cluster and console connections included
High-output charging support for modern alternators
Made in the USA with a lifetime warranty and U.S. tech support
Direct-Fit Features
26 Total Circuits / 18 Fuses with Horn Relay & Maxi Fuse
Factory-Style Bulkhead Connector — installs in stock location with no firewall modifications
Pre-terminated OEM Connectors for headlights, ignition, blower, and wiper systems
Color-coded and printed GM wiring for easy routing and future service
Includes “Full Sweep Dash” and “Super Sport Cluster” pigtails for dash swaps
High-amperage 6-gauge charge wire with 100-amp MIDI fuse protection
Integrated ground system for lighting and accessories
Comprehensive 140-page color manual with schematics and step-by-step photos
Includes Circuits For
26 Total Circuits / 18 Fuses with Horn Relay & MIDI Fuse
Factory-Style Bulkhead Connector — installs in stock location with no firewall modifications
Pre-terminated OEM Connectors for headlights, ignition, blower, and wiper systems
Color-coded and printed GM wiring for easy routing and future service
Includes “Full Sweep Dash” and “Super Sport Cluster” pigtails for dash swaps
High-amperage 6-gauge charge wire with 100-amp MIDI fuse protection
Integrated ground system for lighting and accessories
Comprehensive 140-page color manual with schematics and step-by-step photos
Connections Included
Ignition switch • Headlight switch • Dimmer switch • Wiper motor • Blower motor and switch • Blower resistor • Instrument cluster connectors (includes SS pigtail) • 10SI & 12SI alternator connectors • HEI power and tach leads • All exterior light sockets and bulbs
All hardware, extra fuses, and terminals are included along with a detailed installation manual for a clean, professional-grade finish.
Perfect For
1970–1972 Chevelle & Malibu street restorations and SS dash conversions
Builders seeking a factory-correct fit with modern upgrade capability
Cars with aftermarket gauges, EFI, or electric fuel systems
Pro-Touring and custom projects needing OEM-level reliability