Excess Gas Buildup in the XTS' Brake Caliper Pistons


GM says it needs to bleed the brake systems of 230,000 cars because the recalled vehicles have rear brake caliper pistons that have hydrogen gas trapped inside that could be released into the brake systems. ZF, Excess gas –– we’ve all had it and no-one likes it. The same holds true for your braking system. This problem may cause your brake pedal to feel “spongy” but it’s unclear if it affects stopping distances.

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