Dorman M630639 Brake Master Cylinder. Fits what vehicles: 2009-2012 Chevrolet Aveo, 2009-2010 Pontiac G3, 2009 Pontiac G3 Wave, 2011 Chevrolet Aveo5. Brake Master Cylinder. This brake master cylinder is precision-engineered to match the design, function, and performance of the original master cylinder on specific vehicle years, makes and models.
