Bleeding brakes on a 00 Chevy Suburban, or similar GM trucks from the late 90s and early 2000s, often involves dealing with the Kelsey-Hayes EBC310 ABS system. This system features three distinct sections: one for each front wheel and a combined section for the rear axle. Each section includes an isolation valve and a dump-valve/low-pressure accumulator. The challenge arises when trying to bleed the low-pressure accumulator, which is positioned behind the dump valve, making it inaccessible for traditional bleeding methods.
The factory-recommended procedure for flushing fluid and air from these accumulators involves using a Tech 1 Scan Tool, also known as a GM scan tool. This tool allows technicians to command the ABS computer to cycle the system, effectively forcing fluid and air out of the hidden areas. This ensures a complete and proper brake bleed. However, not everyone has access to a professional-grade scan tool.
For those without a 00 Chevy Suburban Abs Scan Tool, an alternative method exists, often referred to as the “shade-tree mechanic” approach. This involves driving the vehicle on a loose surface like gravel or snow and forcefully applying the brakes to induce wheel lockup, triggering the ABS to cycle.
While this method might seem like a workaround, it comes with inherent risks. First, the brakes need to be functional enough to safely navigate to and from the chosen surface. Secondly, cycling the ABS in this manner can push trapped air from the accumulators back into the brake lines, potentially compromising braking performance significantly. Even if all three circuits (left front, right front, and one rear) activate successfully, a careful drive back and a subsequent traditional bleed are still required to remove any remaining air.
Ideally, using a 00 Chevy Suburban ABS scan tool like the Tech 1 ensures a controlled and thorough bleeding process, minimizing the risks associated with the alternative method. It allows for targeted activation of the ABS system, effectively flushing the accumulators without potentially introducing air back into the lines.
For further information on bleeding ABS systems, refer to this resource:
Brake & Front End Magazine, “Bleeding ABS Systems” by Bill Williams (July 2005)
