Does the 2011 Chevy silverado have a timing belt or chain?

The 2011 Chevy Silverado is equipped with a timing chain instead of a timing belt that is designed to remain maintenance-free and last the lifetime of the vehicle. Most belts require replacing between 60,000-100,000 miles. 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 better protected, operating from inside rather than outside the engine, and are able to stay lubricated more effectively. Occasionally they break, or tensioners stretch, 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, have the chain and tensioner examined by a mechanic.