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the rap circiut is when you park & turn the key off, the radio & windows & stuff continue to be powered for up to 20 min unless you open a door.... the rap circuit can be tapped at the stock radio, but when you remove the radio it no longer functions...
I would highly recommend retaining the rap circiut by adding the onstar module if the radio is removed... then nothing needs to be butchered at all
with the stock radio, check for ign power at the radio, but with the radio actually plugged in so the data lines are intact...
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