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September 14, 2016 Service bulletin

Steering: electric power assist system

GMC technical service bulletin PIC6048E for 2017 GMC Acadia, 2016 Cadillac CTS and 2017 Buick Lacrosse and others.

Bulletin number
PIC6048E
Component
Steering: electric power assist system
Summary
This preliminary information communication advises the technician that some customers may comment on the operation of their haptic seat during a lane keep assist event. Lane keep assist works differently than lane departure warning. The lane keep assist icon is solid amber, forward camera module is actively commanding a torque to electronic power steering. This means that the driver should also feel some feedback from the steering wheel. No chimes or haptic in the seat. Lane keep assist icon is flashing amber; forward camera module is actively commanding torque to electronic power steering. This will also be accompanied with lane departure warning chimes and haptic in the seat feedback based on the setting chosen in the vehicle settings. This will take place when the vehicle has crossed lane marking by (40 cm) or (15.75 in).

Owners of these vehicles have filed 75 complaints in the steering category.

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