All 2011 GM cars / trucks require DEXOS spec engine oil. If you don't go to the dealership for your oil changes, save your reciepts / proof of purchase for your warranty.......
Oils that meet the dexos 1 (yes, with a lowercase “d”) standard provide some real benefits. However, when it comes time for that first oil change, expect a 25-30 percent cost increase -- which could be about the same as choosing pure synthetic oil.
Further, GM says that if a customer has an engine failure that is traced to oil or lubrication issues, and if the customer does not use dexos 1 oil in their gasoline-powered GM vehicle, that act alone could void the warranty. The same goes for GM vehicles with diesel engines, which use a diesel-specific “dexos 2” oil blend.
For more info, go to their site for news and approved oils:
General Motors is committed to designing, building and selling the best cars in the world - and to making the experience of owning a GM vehicle one of the best. That commitment even extends to the oil put into a GM engine. Oil is a vital component of any engine and helps it run at its peak performance.
That's why GM Powertrain Fuel and Lubes engineers developed the dexos™ engine oil specification. The result - an engine oil designed specifically for your GM engine with added performance in areas important to its operation and maintenance. dexos™ is a high quality, robust oil that will contribute to longer drain intervals (meaning a customer can go longer between oil changes) as well as improved emissions performance, fuel efficiency and engine protection. And, just like GM, it's global. That's because the same quality oil needs to be available everywhere.
dexos™ is the recommended oil for any GM car. It's that simple.
Don't take unnecessary risks with your powertrain warranty. Using engine oils other than dexos™ may result in damage to your engine that is not covered.