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Title: Didn't work with an OSTAR equipped 2001 Eldorado
Review: Bought this to replace the original radio system with a digital/satellite/gps system. Thought it would be an easy install based on the apparent specific function of the interface module. Then the nightmare started. Took two different installers and an extra $600.00 to finally get it done right. Can't recommend the project for other Cadillac owners with the OLD analog ONSTAR.
