OEM Western Fisher GMC Chevy 3 Port Wiring Isolation Module Truck Side Light Harness
NOTE: This for the 3 Port Only
Used for the newer GM Trucks with HB3 / H11 or HIR2 Headlights.
To verify fit see Western’s Quick Match
See Western Wiring Schematic Guide
Alternate Part Numbers: 69817-1, 1-W69817-1, 1W69817-1