“I have a 2005 Sierra I would like to get this for is this kit all I need ? Or do I have to buy a wire harness adapter or a programming system or do I get all of this if I pay to have it installed by the store?”
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You need to start with the Compustar remote start harness first like the RS1B-DC3 which is compatible with most cars. From there you can add this module to it which will extend your remote start range with cellular. This particular module is plug and play after you have the harness installed.
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