The G80 is standard on LTZ and Z71 versions of the Silverado 1500 and all Silverado 2500 and 3500 and available on most models. The feature requires no driver involvement. Explaining how it works, Chevy said, "When the G80 detects excessive wheel slip, a flyweight-type governor engages. A self-energized clutch system causes a cam plate to ramp against a side gear, compressing disc pack to cause both rear axle shafts/wheels to rotate at the same speed." The end result is less wheel slip and greater traction.
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