Do you need a brake scan tool to bleed antilock brakes on 1996 Chevy 3500?

Yes, you generally need a scan tool capable of activating the ABS pump to properly bleed the anti-lock brakes (ABS) on a 1996 Chevy 3500. A standard brake bleeder won't be sufficient because the ABS module controls the flow of fluid. The scan tool is necessary to command the ABS pump to cycle, which is required to fully purge the air from the system. Attempting to bleed the ABS system without the scan tool may result in incomplete bleeding and continued ABS problems.