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Home >> Cadillac >> 2008 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System >> Description and Operation >> Radio/Audio System Description and Operation >> Audio Amplifier (If Equipped) >> Amplifier Interface UQA with Y91 or UQS (Serial Data)

Amplifier Interface UQA with Y91 or UQS (Serial Data)

The main amplifier power is provided by a fuse located in the underhood fuse block. The radio controls both the overall muting and the rear seat muting via serial data messaging. For vehicles equipped with UQA, the radio commands the amplifier to perform the following functions through serial data communication.