NHTSA recall 08V200000

What's wrong: Affects vehicles equipped with a 6t70 6-speed automatic transmission. Some of these vehicles have a condition in which the transmission case side bore that holds the park pawl pivot pin may have a casting porosity. This condition, coupled with normal operating stresses, could lead to failure, eliminating the ability to secure the transmission in 'park' position.

Why it matters: If this happens while the vehicle is parked on a non-level surface, the vehicle could roll without warning and cause injury to people in its path.

The fix: Dealers will replace the transmission free of charge. The recall began on May 5, 2008.