CTS V8-5.7L VIN P (2004)
Power Seat Switch: Description and Operation
Lumbar Support (Without RPO Code A45)
POWER LUMBAR SWITCH
The power lumbar switches provide both power and ground to the lumbar motor. Battery positive voltage is supplied at all times to the driver and
passenger seat lumbar switch from the SEATS Circuit Breaker located in the left rear fuse block. Both lumbar switches are grounded through the switch
ground circuit and G307.