General Motors (GM) has issued a large-scale recall of certain Chevrolet and GMC SUV and light-duty truck models over a problem that could lead to one of the rear wheels braking without warning.
The models affected are 2015-2020 Chevrolet Suburban, GMC Tahoe and GMC Yukon vehicles, as well as 2014-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. However, only models equipped with a 5.3L V8 engine, all-wheel drive and a 3.08-ratio rear axle are subject to the recall.
General Motors says that the problem involves one of the sensors connected to the rear wheels; if it malfunctions when the vehicle is moving at between 41 and 60 mph (66 and 96.5 km/h), the driveline-protection system will kick in and apply the brakes to the wheel opposite the sensor. Obviously, brake pressure applied to only one wheel represents a clear risk that could pull the vehicle to one side and potentially cause an accident.
According to GM, the problem lies with an erroneous calculation of the rear-axle ratio by the control module. Vehicles will get a software update to resolve the issue.