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Reese Towpower
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2003 - 2006 GMC Yukon Denali
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The Tekonsha Brakeman IV digital trailer brake controller provides safety and connection when you need it most. As a time-based controller, the Brakeman IV is a great choice for basic, light-duty towing needs. This compact controller works by electronically connecting your vehicle and your trailer. When you hit the brakes in your tow vehicle, it generates an output signal that ramps up, or increases over a period of time, applying braking power to your trailer at a fixed rate. The Brakeman IV has up-front buttons so you can easily adjust power output, the sync ? or aggressiveness with which the controller applies the brakes, and engage manual override to help you brake safely when an unexpected stop pops up. It also works with electric or electric over hydraulic braking systems, and features advanced internal circuit protection, real time comprehensive diagnostics, and short circuit protection. Because the Brakeman IV is a time-based controller, there?s no requirement that it be positioned in the direction of travel; it can be installed anywhere you like as long as it is within reach of the driver. Plus, the Plug & Play feature allows for quick and easy connection with your vehicle?s wiring. The Brakeman IV trailer brake controller works with1-4 axle trailers, comes with all the mounting hardware needed for installation, and is backed by a limited lifetime warranty.
| BRAND: | Reese Towpower |
| PART NUMBER: | 8507111 |
| WEIGHT: | 0.6 LBS |
| MATERIAL: | PLASTIC |
| BRAKE CONTROL TYPE: | TIMED |
| TRAILER BRAKE WHEEL QUANTITY: | UP TO EIGHT WHEELS |
| BRAKE TYPE: | Electric |
| Diagnostic Capable: | YES |
| DISPLAY TYPE: | DIGITAL OUTPUT |
| HYDRAULIC CONNECTIONS: | NO |
| SOLID STATE CONSTRUCTION: | YES |
| CIRCUIT BREAKER PROTECTED: | YES |
| HOUSING COLOR: | BLACK |
| BRACKET INCLUDED: | YES |



Reese Towpower delivers the towing hardware most drivers reach for: receiver hitches across multiple classes, ball mounts, hitch balls, pins, clips, safety chains, wiring and hitch accessories. Backed by a towing pedigree dating to 1952, the line uses all-welded construction and corrosion-resistant finishes, with custom-fit hitches matched to vehicle make, model and year.
The Reese story starts in 1952, when Margaret Reese challenged her husband TJ to do something about travel trailers rocking whenever anyone walked through them. A few years later he built the first pair of stabilising jacks. The idea was simple and it worked, and it changed how the RV industry thought about trailer stability. From that beginning the Reese name grew into a full towing line covering fifth wheel hitches, pin boxes, weight distribution systems and accessories, and Reese Towpower carries that engineering into the products most owners buy off the shelf.
Receiver trailer hitches anchor the range, offered across the classes needed for everything from a small utility trailer to livestock and job-site loads. Construction is all-welded rather than bolted at the stress points, and each hitch is tested against published standards for strength and safety. Custom-fit hitches are engineered to the vehicle manufacturer's weight specifications for a given model and model year, so mounting points line up with existing frame holes and the finished installation sits where it should. Exclusive paint finishes resist rust and corrosion through years of road salt, and hitches carry a nationwide limited lifetime warranty.
No towing setup is complete without the connecting hardware, and Reese Towpower covers it comprehensively. Ball mounts come in fixed, adjustable and specialty forms with a range of rises and drops to level a trailer properly. Hitch balls are offered in the standard diameters and shank sizes, matched to coupler and load rating.
The towing accessories line fills in everything else: hitch pins and clips, locks, receiver tube covers, and safety chains rated to the load being pulled. For most drivers this is where a towing purchase actually begins, and having the whole chain of components from one engineering source keeps ratings consistent end to end.
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1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2003 - 2006 | GMC Yukon Denali | — |
The 2003-2006 GMC Yukon Denali Reese Towpower Brakeman IV Time Delay Brake Controller for Trailers with 1 to 4 Axles Black 8507111 (Part #8507111 70160) fits the following vehicles: 2003-2006 GMC Yukon Denali. Always verify your specific year, make, and model before ordering.
Yes, the 2003-2006 GMC Yukon Denali Reese Towpower Brakeman IV Time Delay Brake Controller for Trailers with 1 to 4 Axles Black 8507111 (Part #8507111 70160) is designed to fit the 2003-2006 GMC Yukon Denali.
The 2003-2006 GMC Yukon Denali Reese Towpower Brakeman IV Time Delay Brake Controller for Trailers with 1 to 4 Axles Black 8507111 (Part #8507111 70160) fits 2003-2006 GMC Yukon Denali models. The 2006 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2003-2006 GMC Yukon Denali Reese Towpower Brakeman IV Time Delay Brake Controller for Trailers with 1 to 4 Axles Black 8507111 (Part #8507111 70160) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The adapter is designed for vehicles equipped with a black Electric Junction Box located underneath the dashboard, left of the steering column, just above the carpet. All vehicles with this factory provision have a location for the adapter, but not all have complete connections to the battery and wiring to the rear for electric trailer brakes. To confirm fitment, locate the Electric Junction Box and check for the mating connection point in the top row, second from the left. If you cannot locate this box or connection point, the adapter may not be compatible with your vehicle. Consult your vehicle's owner's manual or contact the manufacturer for confirmation.
The adapter (part number 18283-037) is a connector that plugs into your vehicle's factory Electric Junction Box to enable electric trailer brake control. It serves as the interface between your vehicle's electrical system and an electric brake control unit, allowing you to control trailer brakes from inside the vehicle. The adapter must be plugged into the mating receptacle on the backside of the brake control before attaching to the vehicle connector.
The black Electric Junction Box is located in the interior of the vehicle underneath the dashboard, left of the steering column, just above the carpet. You will need to remove the cover to access the mating connection point for electric trailer brakes, which is located in the top row, second from the left.
First, plug the brake control adapter into the mating receptacle on the backside of the brake control unit. Then, plug the adapter into the mating connection in the Electric Junction Box. This sequence ensures proper connection before the adapter is attached to the vehicle connector.
After plugging the brake control adapter into the mating connection in the Electric Junction Box, carefully probe the adapter with a circuit tester to verify that battery (+) power is supplied to it. This confirms the adapter is receiving power from the vehicle's electrical system.
If your vehicle has no power supply to or from the Electric Brake Control Adapter, you must use an Electric Brake Control Wiring Kit. This kit includes the necessary wires and components to route power from the vehicle's electrical system to the adapter. Follow the wiring kit installation instructions to route all wires to the wire locations provided, or follow the brake control manufacturer's instructions.
Open the vehicle's hood and locate the black Electrical Center Box on the driver's side. Remove the box lid and cover to expose the vehicle's brake control feed wire (blue). This will require temporary removal of the vehicle's support brace. Attach and route all wires as described in the wiring kit installation instructions.
In the same location as the brake control feed wire, locate the vehicle's battery (+) supply wire (red) in the black Electrical Center Box on the driver's side. Attach and route all wires as described in the wiring kit installation instructions. After installing the wiring kit, reinstall the Electrical Center Box cover, lid, and support brace.
Yes. An in-line fuse or circuit breaker is required for the Electric Brake Control Wiring Kit installation. This protects the circuit from overload and fire hazard.
After plugging the brake control adapter into the vehicle's electric brake control harness connector, follow all brake control manufacturer's installation instructions. Complete the installation per the electric brake control manufacturer's instructions, mount the unit as directed, and perform all test procedures as instructed by the brake control manufacturer.
Do not exceed the lower of your towing manufacturer's rating or the following: maximum 4 axles with 8 brakes (24 amps). Overloading the circuit can cause fires. Consult your vehicle's owner's manual and instruction sheet for additional information about your specific towing capacity.
Perform all test procedures as instructed by the electric brake control manufacturer. The manual does not specify the exact tests, so refer to your brake control unit's installation instructions for the complete testing procedure.
No. The adapter requires a factory black Electric Junction Box underneath the dashboard, left of the steering column. Not all vehicles have this provision or complete electrical connections for electric trailer brakes. Locate the junction box to confirm compatibility.
An in-line fuse or circuit breaker is required only if you are using an Electric Brake Control Wiring Kit to complete the installation. If your vehicle already has complete connections to the battery and wiring to the rear, no additional fuse is required for the adapter itself.
Plug the adapter into the backside of the brake control unit first, then plug it into the Electric Junction Box in your vehicle. Do not reverse this order.
Maximum 4 axles with 8 brakes (24 amps). Do not exceed this limit or your towing manufacturer's rating, whichever is lower, as overloading can cause fires.
Yes, if you are using an Electric Brake Control Wiring Kit, you must temporarily remove the vehicle's support brace to access the Electrical Center Box and the brake control feed wire (blue). Reinstall it after completing the wiring kit installation.





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