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.

Our first DEF fill came at 4,481 miles on the odometer, our second at 8,474 miles, and currently we're showing our DEF level sitting at just over -tank with 12,409 miles.

Software overrides for diesel exhaust fluid sensors that are in perilously short supply are making their way from truck manufacturers to repair shops, helping keep equipment on the road and ...