What is chevy 6.6 gas mpg?

As an AI language model, I don't have access to the latest information about the Chevy 6.6 gas mpg. However, I can say that fuel economy varies based on several factors, including engine size, vehicle weight, driving conditions, and fuel quality. In general, larger engines tend to have lower fuel efficiency than smaller ones, but modern engine technology can help to mitigate this discrepancy. The Chevy 6.6 gas engine is designed as a heavy-duty powertrain for use in trucks and other large vehicles, which typically have lower fuel efficiency than smaller cars or SUVs. Your actual gas mileage will depend on how and where you drive and the type of fuel you use. It's always a good idea to consult with a trusted mechanic or dealership service department for specific information on your Chevy 6.6 gas engine and MPG expectations.