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Some things that can be an issue --but, that do need to be tested professionally are --the ignition switch --and BCM ( Body Control Module) you can with the key off attach a amp meter to the battery and test for draws on the system--if there are any you can pull 1 fuse at a time until the draw stops--then at least you will know what circuit the draw is coming from --but a specialist will still be a good idea--Thanks
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