Chevrolet offers a choice for the Silverado powertrain: Either the 6.6 L8T gas engine, or the 6.6 Duramax - both of which offer potent towing capacity.

The 6.6 Duramax Diesel is a powerful engine developed by Chevrolet, but it has some serious flaws that prospective buyers will want to be aware of.

In almost 25 years powering General Motors trucks and SUVs, the 6.6-liter Duramax V8 diesel engine has earned a loyal following for performance and efficiency.