General Motors’ innovative Ultium electric vehicle platform has encountered challenges, with the latest issue potentially causing power loss in a small number of vehicles on American roads. Thankfully, the problem is confined to just 10 examples across the United States.
The automaker is recalling three Cadillac Lyriqs, three Chevrolet Blazer EVs, two Chevrolet Silverados, one GMC Hummer, and one GMC Sierra EV, all from the 2024 model year, due to a wiring problem in their rear drive units.
The issue was first brought to GM’s attention on April 11, when a quality engineer reported an anomaly through its Speak Up for Safety program. The concern arose from a motor that had not been adequately insulated during assembly at the LG-Magna supplier plant.
GM initiated a product investigation five days later, confirming that some rear drive unit assemblies lacked sufficient insulating varnish. This oversight could result in wire contact, leading to unexpected motor shutdowns.
The potential loss of motive power poses a safety risk, increasing the likelihood of rear-end collisions. Consequently, on May 2, GM determined that a recall was warranted. Fortunately, there have been no reports of warranty claims, accidents, injuries, or fatalities related to this issue.
Given the limited scope of the problem affecting just 10 vehicles in the U.S., rectification should be straightforward. Starting June 24, GM will contact affected owners and instruct them to bring their vehicles to a nearby dealership. There, the rear motor will be replaced with a properly varnished unit, at no expense to the owners.
