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Hydrastar 2024 - 2026 GM Controller Adapter Module for Electric Drum Brakes

2024 - 2026 GM Controller Adapter Module [381-7075] for Electric Drum Brakes

SKU *381-7075
by Hydrastar
Save 8% Save 8%
$75.00
$75.00 - $75.00
$75.00
$69.00
$69.00 - $69.00
$69.00

Fixes the 2024–2026 GM “Service Trailer Brakes” dashboard warning across the full truck and SUV lineup (Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Colorado, Canyon, Hummer EV). This plug-and-play inline diode resolves the compatibility issue between GM’s factory integrated brake controller and electric drum brake trailers. Install takes minutes — cut the blue wire, crimp the module inline, done.

2024–26
GM Trucks
PLUG
& Play
7075
Part #
DOT
Compliant
The Problem

Why Your GM Truck Disables Trailer Brakes

GM’s 2024–2026 factory integrated brake controller sends a diagnostic signal down the blue (brake) wire. When it doesn’t get the response it expects from electric drum brake systems, it triggers a fault — displaying “Service Trailer Brakes” on your dash and disabling braking. This module intercepts that signal and allows normal operation.
Questions about fitment?

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Specifications

Technical Details

Compatible Vehicles 2024–2026 GM Silverado, Sierra, Denali, and other models with factory integrated brake controllers
Brake System Electric Drum Brake
Installation Inline on the blue (brake controller) wire, ~10" from the actuator
Type 2-wire inline diode module
Effect on Other Vehicles None — does not affect non-GM tow vehicles
Part Number 381-7075
Common Questions

Before You Buy

Does this work with non-Hydrastar actuators?+
Yes. The 381-7075 works with any brand of electric drum brake system.
How do I install it?+
Cut the blue wire approximately 10" from the actuator. Crimp the module inline — wires are labeled for direction. Heat shrink the connections. Arrow on the diode points toward the actuator.
Will this void my GM warranty?+
No. This module is installed on the trailer side, not the vehicle side.
My dealer told me about this — is this the right part?+
Yes. GM dealerships are actively referring customers to Hydrastar for this fix. Part #381-7075 for electric drum brake trailers.

Reference: Vehicle Compatibility Chart (PDF)

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