One problem related to engine has been reported for the 1996 Cadillac Seville. The most recently reported issues are listed below.
I had a oil cinsumption problem the car had been using 3 qts of oil every 1800 miles. We found out from a tech that work there at the dealership that there had been a notice sent out to all tech that there was a problem with this and had been for sometime with the northstar engine. And that there still is. The problem is with carbon built up in the rings they added a cleaner to take the carbon off. This is all at the cost of the customer . Which was $524. 24 and has not taken care of the problem. I called Cadillac they told me I was not to get this information it was for teck use only.