RS 6 V8-4.2L Turbo (BCY) (2003)
Relay Box: Service Precautions
Relay and fuse panels
WARNING!
Always disconnect battery Ground (GND) strap before working on electrical system.
NOTE:
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Obtain radio code before disconnecting battery.
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Be sure to activate vehicle features (radio, clock, electric window regulator, engine) when the battery is re-connected.