I have a 2007 chevy tahoe that wont start battery good can take and i can take relay out and cross over and starter engages so its ok i took and run a ground wire from neg battery post to engine block and ran one from ribbion ground to alt bracket still no luck when i turn key on stabiltrak off and service 4wd comes on screen my head lights and radio works my door locks dome lights and wipers wont work.

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those vehicles are electronic nightmares as they age. Have a pro check the anti theft system first