Oyviny 4-Pin Trailer Wiring Harness 41125 for 1988–2000 Chevy/GMC — 16 AWG Pure Copper, Plug-and-Play 4-Flat

Oyviny's Custom 4-Pin Trailer Wiring Harness 41125 is a plug-and-play tow wiring kit built to restore a reliable 4-flat connection on 1988–2000 Chevy and GMC C/K pickups and compatible SUVs.

If your truck or SUV lost its factory trailer socket or you need a fresh, corrosion-resistant four-way connection for lights and signals, this harness is tailored to fit select Chevrolet and GMC models from 1988 through 2000. The kit uses 16 AWG pure copper conductors and tin-plated terminals to deliver solid conductivity, while the 80-inch lead gives you extra reach for mounting in tight or nonstandard locations.

Which vehicles will this harness fit?

This harness is designed for late-’80s through 2000 GM full-size trucks and several SUVs, matching the factory-style 4-way system those models used. It fits many Chevy C/K and K1500 models and is also compatible with specific Chevrolet Blazer, Suburban, Tahoe, GMC Suburban, Yukon, and Cadillac Escalade years—confirm fitment with your vehicle year and bed/cab configuration before ordering.

• Direct fit for many 1988–2000 Chevy & GMC C/K pickups and K1500 models
• Compatible with select Blazer, Suburban, Tahoe, Yukon, and Escalade years
• Matches factory 4-way flat connector locations and wiring colors

How durable and conductive is the wiring?

Oyviny uses 16 AWG bonded pure copper wire throughout this harness, providing lower resistance than many cheaper kits. Terminals are tin-plated to resist corrosion and maintain conductivity over time, and the connector includes a rubber dust cover to keep moisture and debris out when not in use.

• 16 AWG pure copper conductors for reliable signal and tail power
• Tin-plated copper terminals reduce oxidation and voltage drop
• Rubber dust cover protects the socket from water and dirt

Is installation difficult and will I need to cut factory wiring?

This harness is built for a plug-and-play installation with no cutting or splicing required when matched to the original vehicle plugs. The kit plugs into existing sockets and provides the standard 4-way flat trailer connector at the vehicle rear, saving time and keeping factory wiring intact.

• Pre-terminated connectors plug directly into factory sockets
• No splicing or wire modifications needed for compatible vehicles
• 80-inch lead allows flexible routing and secure mounting locations

What does the kit include and what should I check before buying?

The harness includes the vehicle-side harness with 4-flat trailer connector, tin-plated terminals, and a rubber dust cap. Before purchase, verify your truck or SUV year, model, and whether the original under- or in-bed connector type matches the harness; if the vehicle has nonstandard aftermarket wiring, additional adapters or splicing may be required.

• Complete vehicle-side harness with 4-way flat connector and dust cover
• 80-inch cable length for flexible routing behind bumper or in-bed
• Check OEM connector type and existing wiring condition for compatibility

Who is this for: This Oyviny 4-pin trailer wiring harness is aimed at owners of 1988–2000 Chevrolet and GMC full-size trucks and many matching SUVs who want a dependable, factory-style 4-flat connection without cutting into original harnesses. It's ideal for DIY mechanics, restoration projects, and anyone replacing a corroded or missing trailer socket who prefers copper conductors and a ready-to-install solution.