BAITHNA GM Genuine Parts 20904439 Trailer Brake Control Relay Assembly – Replaces 20904439, Compatible with Chevy, GMC & Cadillac

GM OE quality for reliable trailer braking

The BAITHNA GM Genuine Parts 20904439 Trailer Brake Control Relay Assembly is a GM-recommended replacement designed to mirror the original factory component. Crafted to GM Original Equipment specifications, this relay aims to deliver consistent fit, form, and function, so you can tow with confidence. While it does not guarantee specific outcomes, many drivers find that using an authentic-style replacement helps maintain smooth brake signaling to the trailer, especially when pulling heavier loads on varying road conditions.

This part is intended as a direct replacement for the 20904439 designation and cross-reference numbers such as 2090-4439, 25792959, 25848909, 25837945, and 15819418. By adhering to GM OE standards, it seeks to offer the same electrical performance and durability you expect from genuine GM components.

What you get with BAITHNA 20904439

• GM Original Equipment specification for fit, form, and function, ensuring compatibility with GM vehicles.
• Cross-reference compatibility that covers common 20904439 replacements across GM trucks and SUVs.
• Quality, reliability, and durability aligned with GM OE expectations.
• One-year warranty support: if there is any issue, contact us for a refund or replacement.

Vehicle compatibility at a glance

The relay is described as compatible replacement for GMC and Cadillac vehicles, spanning models such as Escalade, Escalade ESV, Escalade EXT, Avalanche, Silverado 1500, Silverado 3500 HD, Suburban 1500/2500, Tahoe, Sierra 1500/2500 HD, Yukon, and more within the 2007–2014 range. When matching parts, verify fit against GM OE guidelines and your vehicle’s electrical specifications.

• Escalade family (2008–2014)
• Sierra and Silverado pickups (2007–2014)
• Tahoe, Suburban, Yukon family (2008–2014)
• Other GM trucks and SUVs listed in the cross-reference notes

Real-world scenarios include towing a boat or camping trailer, navigating highway grades, and managing braking signals in variable weather. While results can vary by setup and usage, this relay is marketed as a compatible, GM OE-style replacement that supports proper trailer brake control signaling when installed correctly.

Care and installation typically involve handling the relay as you would other GM electrical components, checking for proper electrical connections, and ensuring the part is seated securely. If you’re unsure about installation, professional assistance is recommended to verify electrical integrity and vehicle compatibility.