Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Strange to have two warnings, but they may have faulted at different times.
There would be a sensor in the coolant header tank for the coolant warning, and a sensor in the side of the engine sump for oil level.
The first thing I would do is scan the vehicle for DTCs (codes), and checked some data in PCM (engine), DIC, Instruments, BCM etc.
You may to take it to your Cadillac dealer.
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I hope my advice has been of assistance to you.