With the introduction of the '07 GMT900 trucks, you can get a 2500HD or 3500HD with an all-new body and interior wrapped around a cleaner and more powerful version of the famous Duramax diesel or a ...

It’s back to the future, GM style. The automaker’s first inline six-cylinder engine since 1985 is bound for production next year, with 270 horsepower and 275 pounds-feet of torque. The Vortec 4200 ...