Enhance nighttime visibility and safeguard your electrical system with 1973-87 Square Body Chevy & GMC Truck Heavy Duty Headlight Harness, Single Headlight. The original factory wiring in these General Motors classics wasn’t built to handle the higher demands of modern halogen or xenon H4 headlights which often leading to dim, flickering, or inconsistent lighting. This plug and play upgrade solves those problems while keeping your truck’s dash and engine bay looking stock.
This harness is equipped with OE style connectors for both high and low beams, high heat ceramic headlight sockets, heavy duty relays, and premium grade wiring for optimal performance and long service life. By drawing power directly from the battery rather than pushing it through the headlight switch, it prevents overloads, melted plugs, and premature switch failure while still allowing your factory headlight controls to function normally.
Perfect for trucks running upgraded 7 inch round halogen or xenon bulbs, as well as original style sealed beams.
Advantages & Fixes:
- Designed for 1973–1987 Chevy & GMC C/K Series pickups, K5 Blazers, Jimmys, and Suburbans
- Setup is for 2 headlights. For one headlight on driver side and one on the passenger side.
- Restores full headlight brightness
- Stops flickering and back-feeding power problems
- Prevents malfunctions when switching between high and low beams
- Protects the headlight switch from excessive load and heat damage
- Heat resistant ceramic plugs outlast standard plastic connectors
- OE style plugs for a clean, factory like installation
Kit Includes:
- Heavy duty single headlight wiring harness
- High heat ceramic H4/9003 headlight sockets
- Dual relays for reliable power flow
- Factory style high and low beam connectors
Give your 1973–87 General Motors pickup the bright, dependable headlights it deserves. This harness delivers safer night driving and a simple solution to dim or unreliable lighting in your classic Square Body. Please check out our 1980-87 Square Body Chevy & GMC Truck Custom Clear Rectangular Single Headlight
