I bought this Impala used,only 150,000 miles. No mechanical issues. It has a 3.9 engine. This past Sunday the stablitrac warning came on then the engine light came on, then the engine blew. This car engine was well cared for. We changed oil and followed maintenance suggestions. Now I'm paying for a car I can't drive until we save money for a new engine. Has anyone else had problems with the 3.9 engine?