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Home >> Hummer >> 2007 >> H2 4D Utility Pickup >> Repair and Diagnosis >> External Pages >> Different car >> Section 1719 (Antilock Brake System - Non-Hybrid Greater Than/Equal To 3900 Kg (8600 Lb) GVW With TCS & VES) >> Description and Operation >> ABS Description and Operation (With JL4) >> Pressure Hold

Pressure Hold

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

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