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  1. CTS First Generation Forum - 2003-2007
    I have a 2003 cts with a 3.2 has 120,000 on it and is Vin N. The coolant temp sensor, air intake sensor, and camshaft position sensor wont work they all read high voltage. I replaced all the sensors as well as the ECM and that didn't help so I dug into the wiring diagram and discovered they all...
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