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May 1, 2011 Service bulletin

General motors: hybrid brake noise or vibration. brakes groan or thump noises during braking; brake pedal...

Chevrolet technical service bulletin PIT-4858 for 2009-2011 Chevrolet Silverado, 2008 Chevrolet Tahoe Hybrid and 2008 GMC Yukon Hybrid and others.

Bulletin number
PIT-4858
Component
Service brakes, electric
Summary
General motors: hybrid brake noise or vibration. Brakes groan or thump noises during braking; brake pedal pushback or vibration that may resemble a pulsation as the vehicle comes to a stop; a slight drop in the brake pedal when coming to a stop.

Owners of these vehicles have filed 34 complaints in the brakes category.

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