For 2006-2011 Chevrolet HHR. For 2005-2010 Pontiac G6. For 2004-2010 Chevrolet Malibu. For 2006-2009 Pontiac Solstice. Seized or leaking piston: Brake pads fail to retract after braking (tight wheels, overheating hubs) or brake fluid leakage on caliper surfaces;.