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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1580 (Antilock Brake System - Hybrid (Hp2) With Traction Control System & Stability Control System) >> Diagnostic Information and Procedures >> DTC C0110, C12E0, C12E8, or C12E9 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The pump motor is a bi-directional motor and is an internal part of the brake pressure modulator valve assembly. There are three solid state relays in the electronic brake control module (EBCM) that operate the pump. The pump motor runs every few brake stops in order to fill the high pressure accumulator with brake fluid anytime the engine is running.

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