As seen on
Sign Up to Get
10% Off Your Next Order!
+ 500 FREQUENT BUYER POINTS
Be among the first to receive Weekly Specials & OPGI News.
10% off restoration parts only. 500 Frequent Buyer Points added after promotional order ships. See welcome email for full details.
Sign up for texts from OPGI, and get all our best offers and more!
By subscribing to OPGI text messaging at 80205, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy.
ADDED TO YOUR CART!
Wiring Harness, Chassis, Painless Performance, Pro Series, 25 Circuit
ADDED TO YOUR WISHLIST!
The Painless Pro Series wiring harness simplifies wiring for your pro-touring or custom vehicle, offering ample circuit length for flexible routing and a clean installation. It includes over 25 GM-style connectors for compatibility with most '60s–'90s GM switches, LED ATC blade fuses for easy troubleshooting, and a modern 6-gauge charge wire with a midi fuse to handle high-amperage alternators. Pre-terminated with factory-grade crimping, it features a grommet or bulkhead firewall pass-through and provides a comprehensive set of terminals, splices, heat shrink, and accessories. With extra-long wires and a lifetime guarantee, it ensures a reliable, hassle-free setup. This harness comes with adaptable open-ended ignition switch wiring and terminals, allowing you to adapt to any ignition switch you desire! GM old style (3-3/4”) and new style (4-1/4”) turn signal switch connectors are included.
Included with the GM Pro Series harnesses is: (4) H4 Headlight connectors- to support single (high/low) or dual headlights (separate high beams) (2) Turn signal connectors- fits connectors found on factory GM hard wired turn signals (4) Molded ¼ sockets for front & rear marker lights (2) HEI distributor connectors (+ and Tach) (2) Connectors for factory GM wiper motor GM washer pump connector Courtesy light sockets GM headlight switch connector GM dimmer switch connector Gm brake switch connector GM turn signal switch flat connectors (early & late) Neutral Safety Switch connector (column mounted or factory floor shifter mounted) Reverse Switch connector (column mounted or factory floor shifter mounted) Braided ground straps (for body and core support to frame grounding, also includes (6) self-tapping ¼” screws for mounting) Alternator bag kit with terminals, splices, resistor, diode to connect the alternator. (1) Connector for GM 10si alternator Assortment of insulated and non-insulated splices, ring terminals, heat shrink, grommets, cable ties, and cable tie clips.
Find parts that fit your vehicle
