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Discussion Starter #1
I've installed tons of them, but my friend did a blazer with an alarm, and it completely locked up the ignition. I didnt know if the alarm system would make that happen, because that would suck!!!
 
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The alarm and anti-theft system have nothing to do with the radio, in a Blazer or an Impala. If your friend had ignition problems after installing a radio, then something was mis-wired.

The Impala is equipped with a GM data-bus type radio, so unless you use one of the expensive adapter modules or a relocation harness, you'll lose all audible warning chimes when the radio is removed. But even if you don't use a data bus adapter, you shouldn't have any problems with the alarm or anti-theft system.
 
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