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i have the 05 rcsb silverado 4.3 and i already had a stereo setup and i upgraded it to a bigger amp and bigger sub that required o gauge wire after i was dont installing everything. i went to hook up the my accesory wires like both amps and door soleniod popper power on my factory gm post adapter for extra ring conn. when i touched them all together and went to put the bolt on it snapped and sparked at me. something popped but i dont know what nor can i find it. im pretty sure ididnt ground it out when i hooked it up.
 

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Do you get anything at all with the key in different positions? Radio, dash lights? Does the fuel pump run? Click from starter? Spark is not good. Isn't that why it is recommended to disconnect thhe battery before doing any electrical work.
 
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