A recent notification on the GM Fleet Order site suggests that new 2019 Chevy Silverado 1500 trucks with a 3.0L Duramax turbo-diesel can be ordered starting on Mar 11, 2019.
The internal code for the new straight-six diesel is LM2, and it should be available for fleet orders starting tomorrow (see screenshot below).
Chevy.com consumer website still does not have the 3.0L diesel as part of the online configurator. It means we still do not have official power and towing/payload, or fuel economy specs for the new engine. We also do not have official pricing.
Chevrolet does say that the new 3.0L I6 diesel will be mated to a 10-speed automatic transmission. It will offer engine auto stop/start, and the diesel will be available with the following Silverado 1500 trims: LT, RST, LTZ, and High Country.
Unofficial (leaked) documents suggest the engine will produce around 282 hp and 450 lb-ft of torque. The unofficial highway MPG estimate is 28 MPG, and the unofficial maximum towing rating is 7,800 lbs.
The good news is the half-ton turbo-diesel is making progress towards production. The bad news is that we still have to wait sometime to learn all the specs and to drive it.