The Lyriq is the first Cadillac to use the Ultium electric vehicle platform developed by its General Motors parent company. It’s a crossover that straddles the compact and mid-size categories, and was designed to appeal to the brand’s core demographic of shoppers looking for an upscale car with utility-vehicle practicality.
Issue:
Under certain conditions, a software problem could cause the antilock braking system (ABS) not to work properly. As a result, the ABS could cause reduced braking or a loss of brakes.
Safety Risk:
Reduced braking or a loss of brakes can increase the risk of a crash.
Corrective Actions:
General Motors will notify owners by mail and send a wireless over-the-air software update to eligible vehicles to update the electronic brake control module software. Alternatively, you may schedule an appointment to have the update performed at a GM dealership.
Issue:
On certain vehicles, a software problem could cause the lower beam headlamps not to turn on as it becomes dark outside if the multi-function switch is in the "OFF" or "PARKING LAMP" position. This could also cause the daytime running lamps (DRLs) to turn off when the vehicle is moving. As a result, the vehicles may not meet certain requirements of Canadian regulations.
Safety Risk:
Headlamps and/or DRLs that don't turn on could reduce visibility, make the vehicle less visible to others and increase the risk of a crash.
Corrective Actions:
General Motors will notify owners by mail and advise you to take your vehicle to a dealership to update the body control module (BCM)software.
Issue:
On a small number of vehicles, the rear seat belt bracket may not have been properly welded to the seat frame. As a result, the seat belts for the rear left and centre seats could detach.
Safety Risk:
A seat belt that detaches in a crash could create an increased risk of injury.
Corrective Actions:
General Motors will notify owners by mail and advise you to take your vehicle to a dealership to replace the rear seat cushion frame. General Motors recommends not to use the rear left and centre seats until the recall repairs are completed.
Issue:
On one vehicle, connections within the high-voltage battery pack may be out of position or may not have been properly welded. As a result, the vehicle may enter a reduced power mode or this could cause a loss of power to the wheels.
Note: This problem could cause a battery warning light and "Service High Voltage System" message to display in the instrument panel. A "Charging Disabled" or "Vehicle Will Not Restart" message may also display.
Safety Risk:
A loss of power to the wheels could increase the risk of a crash.
Corrective Actions:
General Motors will notify the owner by mail and advise them to take their vehicle to a dealership to replace the high-voltage battery pack.
Issue:
On a small number of vehicles, a software problem could cause the pedestrian warning sounds not to work when the vehicle slows from 30 to 25 km/h. As a result, the vehicle may not produce enough sound to be detected by a pedestrian or cyclist. Electric vehicles are required to make a minimum sound level when operating at low speeds.
Safety Risk:
Pedestrian warning sounds that don't work could create an increased risk of injury for pedestrians and cyclists.
Corrective Actions:
General Motors will notify owners by mail and advise you to take your vehicle to a dealership to reprogram the body control module.
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