The DEF level sensor of the affected Chevy Silverado, Tahoe and Suburban vehicles with Duramax engines may read incorrectly, function erratically, or become stuck.

GM has issued a service bulletin for a DEF sensor problem fix for the 2020 to 2024 GMC Sierra 1500, GMC Sierra HD, and GMC Yukon involving module recalibration.

Issues that can arise with out-of-spec diesel exhaust fluid include the perhaps most obvious one — improper urea concentration, which at a drastic-enough level can trigger derating of the engine ...

Fuel mileage, how much diesel exhaust fluid use, and a tutorial on how to check DEF (diesel exhaust fluid) level in the Jeep Wrangler Diesel using Four Wheeler of the Year 2020 Wrangler Rubicon ...

The Environmental Protection Agency (EPA) announced a revision to diesel exhaust fluid (DEF) guidelines to prevent diesel on-road trucks and off-road equipment from severe power loss after running out ...