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Home >> GMC >> 2012 >> Yukon Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1328 (Antilock Brake System - Non-Hybrid Greater Than/Equal To 3900 Kg (8600 Lb) GVW) >> Description and Operation >> ABS Description and Operation >> Pressure Hold

Pressure Hold

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 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.