I have 4 engine codes coming

 

Year ?
Make ?
Model?
Engine?

The codes you listed point to a Northstar engine.
That is the only Caddy i know to have 2 crank sensors.
But i would rather not guess at your problem.
https://www.cadillacforum.com/m_9792/tm.htm

 

Twocodes you listed could be set by problems with the crank sensors.
Your year and model had several updates on the crank sensors.
The latest ones are black (bottom) and grey(top) in color.
If your crank sensors are the old yellow and tan i would get the new ones on there before going further.

 

If you locate the oil filter then look up and right(towards the driver side)on the engine block.
Directly behind the front motor mount bracket.