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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 893 (Anti-Lock Brake System, Traction Control System & Stability Control System) >> Description and Operation >> ABS Description and Operation (Equal to or Over 8600 GVW) >> Antilock Brake System (ABS) Operation >> Pressure Hold

Pressure Hold

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 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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