Painless Wiring 10413 25 Circuit Pro Series GM Harness with Bulkhead

The Painless Performance 10413 Pro Series 25 Circuit Harness delivers complete wiring system designed for pro-touring builds and custom GM applications. This professional-grade harness features a GM bulkhead-style firewall pass-through with interior-mounted fuse block, using the same connector design GM used from 1968 and up for authentic integration.

Key Features:

• 25 circuit capacity with extra-long wire runs—up to 20 feet to the front and over 25 feet to the rear
• Over 25 GM factory-style connectors compatible with 1960s through early 1990s GM switches and components
• LED ATC blade fuses that illuminate when blown for easy troubleshooting
• Heavy-duty 6 gauge charge wire with maxi fuse (eliminates problematic fusible links)
• Pre-terminated wires using Packard factory crimping machines for professional connections
• GM column-mounted ignition switch connector—plugs directly into GM keyed columns
• Bulkhead firewall connector allows easy disconnection of forward wiring without removing individual component connections
• Complete front and rear ground harnesses included for simplified lighting circuit grounding

What's Included:

• Complete 25 circuit wiring harness with bulkhead firewall pass-through
• GM connectors and terminals for custom termination after trimming to length
• Insulated and non-insulated butt splices
• Heat shrink tubing, grommets, cable ties, and cable tie clips
• Ground straps for proper electrical grounding
• Detailed installation instructions

The generous wire length gives you complete freedom to route and conceal wiring exactly how you want it, while the GM-style connectors transform this universal harness into a near-direct-fit solution for classic GM applications. Backed by Painless Performance's lifetime guarantee, this harness takes the complexity out of rewiring your custom or restored vehicle.