Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
If the engine light is on you will need to have the computer scanned to retrieve the codes from the memory. This will tell us why the light is on and what the running rough is caused by. A lot of auto part stores will do this for free, once you have those codes send them to me and we can narrow done the fix for you.
What model is the Cadillac and what is the engine liter size?