Buick Terraza Questions

pounding, banging noise from rear suspension when hitting frost cracks in ...

pounding, banging noise from rear suspension when hitting frost cracks in the roads. air shocks have been replaced with reg. monroe matics, still same noise.  Wverything seems to be tight in the suspension

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My 2007 Buick Terraza has the same problem with Stability System as outlined in "BUICK TERRAZA 2005 Safety Report #10130619". The problem started at around 45,000 miles. Without warning the brakes engage causing car to abruptly slow and swerve to