Did you also check the air filter? The Cadillac CTS is very finicky about the differential pressure across the air filter. Checking the air filter often causes the hose between the air filter box and the intake to come loose or start to leak. This will cause the car to run rough or die immediately after starting.
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Check the oil pressure sending unit is connected properly. These engines are protected aginst running low or out of oil. The 10 second timer alows the car to build oil pressure, if none is present it will shut down. Is the oil proper viscosity and at the proper level?
How can I thank you ever so much you saved my a$$ not to mention my pocket I had a tow truck ready and the dealership smiling now I am thanking you :) whom ever posted the hose lose wow it was the trick it wouldnt start
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How to change the thermostat on a 04 CTS
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