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As I stated in another thread " I purchased a 6 CD unit OEM and have installed it. I do not believe it is a Bose unit because it has no markings on it and also it does not say Bose on start up. It fit perfectly and is now installed. I had now lock problems at all and it functioned as normal except now the volume is not as powerful as the original unit and also my alarm system does not work. Any help? "
I have a Tech II that is available here on the AF Base I work at and wonder if anyone can give me a tip on how to set the radio using it so it functions as the original one did?
 

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2007 chevy trailblazer_ss_1ss
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You have to go to the dealer and get the radio programmed to match the setup of your truck. I'm guessing you bought a radio out of a full size truck? Those radios can be Bose/Non-Bose/Lux/Non-Lux based on the programming (unlike navigation radios). There's also different programming based on SWB, LWB, etc.
 
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