REESE Towpower trailer brake controller wiring harness 7805011 — OEM-style plug for 2003–2007 GM & Hummer, positive-locking fit

REESE Towpower 7805011 is an OEM-style wiring harness that lets you plug a REESE or Tekonsha trailer brake controller into the vehicle's factory under-dash connector quickly and securely.

This wiring harness is built to match factory-style connections so you can avoid cutting or splicing vehicle wiring when installing a compatible brake controller. It provides a secure, positive-locking plug on the brake-control end and a vehicle-specific factory connector on the other, making installation straightforward for the listed GM and Hummer models from the 2003–2007 era.

Which vehicles will this harness fit?

The harness was manufactured to mate with factory under-dash connectors used on select General Motors and Hummer full-size trucks and SUVs from the mid-2000s. Use the vehicle list to confirm compatibility with your model, year, and trim before ordering.

• 2003–2006 Chevrolet and GMC full-size models (Tahoe, Suburban, Silverado, Sierra, Yukon series)
• 2003–2007 Hummer H2 and H2 SUT applications
• Specific 2007 Classic Silverado and Sierra models (1500 and HD Classic variants)

How easy is installation for a DIYer?

Installation is designed to be plug-and-play: one end clips into the factory under-dash socket and the other plugs directly into the brake controller. That removes the need to splice wires, reducing installation time and preserving factory wiring integrity.

• No wire cutting or splicing required — factory-style connectors match vehicle harness
• Positive-locking connector prevents accidental disconnection
• Typical install requires only basic tools and about 15–30 minutes

Which brake controllers work with this harness?

This pigtail is compatible with REESE Towpower controllers and many Tekonsha brake controllers that use the same plug style. Confirm your controller’s plug shape matches the harness before purchasing to ensure a correct connection.

• Direct compatibility with REESE Towpower series controllers
• Compatible with Tekonsha controllers using the same OEM-style plug
• Works with most controllers designed for vehicle factory under-dash connectors

What safety and reliability features does the harness include?

The harness includes a positive-locking plug that resists vibration-related separation and keeps electrical contacts secure. Materials and terminal fitment are designed to maintain a dependable connection for trailer brake signal and power transmission.

• Positive-locking connector reduces risk of loosening on rough roads
• Factory-style terminals preserve proper electrical contact and polarity
• Pre-terminated ends minimize installation errors and improve reliability

Who this is for: This REESE Towpower 7805011 harness is ideal for vehicle owners and technicians who want a clean, factory-style installation of a compatible trailer brake controller on supported mid-2000s GM and Hummer trucks and SUVs. It’s a good choice if you prefer a plug-and-play solution that preserves the vehicle wiring, reduces installation time, and gives a secure, OEM-like connection for towing setups.