International CV trucks (Class 4, 5, and 6). The L5D was downrated to increase reliability and reduce downtime. The L5D was introduced in 2018 for the 2019 model year Chevy Silverado MD and International CV trucks. Specifications for the L5D are at 2600 RPM and at 1600 RPM. See also List of GM engines Allison 1000 transmission References External links LML DURAMAX Duramax home page DMAX, Ltd. home page Duramax Diesel Specs Duramax timeline DMAX engines Diesel engines by model V8 engines