GM Genuine Parts 20904439 trailer brake relay assembly with durable OE components for dependable towing.
GM Genuine Parts relay coil and contacts illustrating precise electro-mechanical switching for trailer braking.
GM Genuine Parts 20904439 trailer system control functions enabling integrated braking operations.
GM Genuine Parts OE engineering reflects GM validation for Chevrolet, Buick, GMC, and Cadillac trailers.
GM Genuine Parts 20904439 trailer brake relay assembly with durable OE components for dependable towing.
GM Genuine Parts relay coil and contacts illustrating precise electro-mechanical switching for trailer braking.
GM Genuine Parts 20904439 trailer system control functions enabling integrated braking operations.
GM Genuine Parts OE engineering reflects GM validation for Chevrolet, Buick, GMC, and Cadillac trailers.

GM Genuine Parts 20904439 Trailer Brake Continue Relay Assembly – OE Quality Trailer Tow Relay

Overview When you’re towing, reliability is essential. The GM Genuine Parts 20904439 Trailer Brake Continue Relay Assembly...
Vendor: GM GENUINE PARTS
Availability: In stock
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GM Genuine Parts 20904439 trailer brake relay assembly with durable OE components for dependable towing.

GM Genuine Parts 20904439 Trailer Brake Continue Relay Assembly – OE Quality Trailer Tow Relay

£62.23
GM Genuine Parts 20904439 trailer brake relay assembly with durable OE components for dependable towing.
GM Genuine Parts relay coil and contacts illustrating precise electro-mechanical switching for trailer braking.
GM Genuine Parts 20904439 trailer system control functions enabling integrated braking operations.
GM Genuine Parts OE engineering reflects GM validation for Chevrolet, Buick, GMC, and Cadillac trailers.

GM Genuine Parts 20904439 Trailer Brake Continue Relay Assembly – OE Quality Trailer Tow Relay

£62.23
Description
Description
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Overview

When you’re towing, reliability is essential. The GM Genuine Parts 20904439 Trailer Brake Continue Relay Assembly is designed, engineered, and tested to rigorous GM standards and backed by General Motors. This OE-grade relay functions as an electro-mechanical switch with a coil and a set of connection points, delivering precise control signals to your trailer braking system. By choosing a true GM part, you align with the original design intent and service expectations for GM vehicles.

Key benefits

  • True OE status: produced or validated by GM for Chevrolet, Buick, GMC, and Cadillac vehicles.
  • Rigorous design and testing: GM engineers validate OE parts to integrate new materials and technologies over time.
  • Reliable electrical switching: compact electro-mechanical relay with a coil and contact points for dependable operation.
  • Flexible trailer braking control: supports a variety of functions within the trailer brake system.

What this means for you

In everyday towing scenarios, this relay can contribute to smooth brake activation, stable electrical connections, and compatibility with GM vehicle electronics. As a factory-backed part, it aligns with the original design intent and service requirements of your GM vehicle.

Real-life use cases

  • Replacing or refreshing a trailer brake relay during maintenance on a Chevrolet, Buick, GMC, or Cadillac vehicle.
  • Ensuring consistent brake signal reliability after material updates or routine service performed by GM engineers.

Why choose GM Genuine Parts

GM Genuine Parts are the true OE option installed during production or validated by GM for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). GM regularly updates production and service part designs to integrate new materials and technologies, helping you stay aligned with GM’s service expectations.

FAQ

Q: What is the GM Genuine Parts 20904439 Trailer Brake Continue Relay Assembly used for?

A: It acts as an electro-mechanical switch in the trailer brake system, enabling reliable control functions backed by GM engineering.

Q: Is this part compatible with my GM vehicle?

A: GM engineers design OE parts for GM brands and update designs to fit Chevrolet, Buick, GMC, and Cadillac models.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

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Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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