Assembly (4 wheel ABS), (LH frame below cab), w/o active brake control; w/o traction control. ABS (Anti-Lock Brake System) Pump & Control Module / EBCM. Used, tested, and in good working condition. This unit includes both the hydraulic valve body (pump) and the electronic control module (EBCM). This assembly is the factory solution for the common "ABS" and "Brake" warning lights on the dash, or the "pump motor running constantly" issue often found in these GM trucks. It has been inspected for internal corrosion and verified to have clean electrical pin connectors. Genuine OEM Parts: Trusted Quality assurance for your. Item must be in original condition. What's Included in Box.