Oyviny Custom 4 Pin Trailer Wiring Harness 41125 for

This harness is built to fit classic GM trucks and select SUVs without cutting or splicing: a standard 4-way flat connector, 80 inches of 16 AWG pure copper conductors, tin-plated terminals and a rubber dust cover for the socket. It’s designed to replace worn factory plugs or add a reliable connection when towing small trailers, utility carts, or boat trailers. The wiring is flexible enough for tighter routing and the materials focus on conductivity and corrosion resistance to keep signals bright and dependable.

Which vehicles and model years does this harness fit?

The Oyviny 41125 is engineered for 1988–2000 Chevrolet and GMC C/K pickup trucks and fits certain Chevrolet Blazer, Suburban, Tahoe and GMC Suburban, Yukon, plus Cadillac Escalade models from compatible years. Check your vehicle’s factory connector style and mounting location before ordering to confirm compatibility.

• Fits 1988–2000 Chevy/GMC C/K pickup series
• Compatible with select Blazer, Suburban, Tahoe, Yukon, Escalade models
• Designed to match OEM 4-way flat connector layout
• Plug-and-play: no cutting or splicing required

How does this harness perform in real towing conditions?

Performance centers on conductivity and protection: 16 AWG pure copper conductors and tin-plated terminals reduce voltage drop and resist corrosion. The 80-inch cable length offers routing flexibility behind the bumper, while the rubber dust cover helps keep the connector clean when not in use.

• Pure copper wires for consistent signal transfer
• Tin-plated terminals for corrosion resistance
• 80-inch length for flexible mounting and routing
• Rubber dust cover protects connector from grime and moisture

How simple is installation for a DIY mechanic?

Installation is straightforward: the harness plugs into the factory sockets on both vehicle and trailer, eliminating the need to cut, splice or solder. That makes it a time-saving option for do-it-yourselfers who want a clean, OEM-style connection without custom wiring work.

• Ready-to-plug: fits existing vehicle and trailer plugs
• No cutting, splicing, or special tools required
• Typical install time under an hour for most users
• Instructions: verify connector orientation and secure routing points

What materials and features extend the life of this harness?

The harness combines durable 16 AWG bonded copper conductors with tin-plated terminals and a corrosion-resistant connector housing to maintain reliable connections over time. Flexibility in the jacket material reduces stress at bends, and the dust cover minimizes exposure to dirt and moisture when the trailer is not connected.

• 16 AWG bonded pure copper for low-resistance wiring
• Tin-plated copper terminals for longevity in harsh conditions
• Flexible jacket reduces cracked insulation at tight bends
• Dust cover protects unused connector from contaminants

Who this harness is for: The Oyviny 41125 is aimed at owners of 1988–2000 Chevrolet and GMC C/K pickups plus compatible Blazer, Suburban, Tahoe, Yukon and Escalade drivers who need a reliable, OEM-style 4-way flat trailer connection. It’s ideal for DIYers, fleet managers refreshing older trucks, and anyone who tows light trailers and values conductivity, corrosion resistance and a plug-and-play installation. If your vehicle uses a standard 4-way flat plug and you want a direct replacement with pure copper wiring and protective features, this harness is a practical, long-lasting solution.