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Home >> Hummer >> 2007 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 1463 (Antilock Brake System - Non-Hybrid Less Than 3900 Kg (8600 Lb) GVW) >> Description and Operation >> ABS Description and Operation >> Antilock Brake System (ABS) >> Pressure Hold

Pressure Hold

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The EBCM closes the isolation valve and keeps the dump valve closed in order to isolate the slipping wheel when wheel slip occurs. This holds the pressure steady on the brake so that the hydraulic pressure does not increase or decrease.

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