Does the 2009 Chevy Impala have a timing belt or chain?

The 2009 Chevy Impala is equipped with a timing chain, instead of a timing belt. Most belts need replacing between 60,000-100,000 miles, but the Impala's timing chain is designed to remain maintenance free and last the lifetime of the vehicle. By default, metal chains are more durable, don't suffer from cracking or drying out like belts do, and can improve fuel economy. Chains are also more protected, operating from inside rather than outside the engine. Occasionally they break, which can have catastrophic results for the engine. If You're finding metal shavings in the oil, experiencing mIS Fires or hearing a rattling noise while idling, make sure to have the chain examined by a mechanic.