Lumbar Switch
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
The lumbar switch provides both power and ground to the lumbar horizontal motor. Battery positive voltage is supplied at all times to the seat lumbar switch through a 25A circuit breaker located in the I/P fuse block. Ground for the lumbar switch is supplied through the switch ground circuit and ground connection.