Vehicles equipped with the 4.6L engine may develop excessive oil consumption. Please be advised that under optimum driving conditions, using one quart of oil every 2000 miles is acceptable. This Cadillac standard applies to vehicles with less that 50,000 miles. Our technicians tell us that if you experience excessive oil consumption it may be caused by built up on the piston rings which restricts movement, preventing them from wiping all the oil from the cylinder walls. Oil left behind is then burned during the combustion process. There is a special ring cleaning procedure which can help this situation. The GM service bulletin number is #02-06-01-009C.
Problems for specific Cadillac DeVille years:
Car problem reports
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Newest reported 1997 Cadillac DeVille problems
The engine may develop oil leaks from the lower crankcase portion of the engine block. Our technicians tell us that the engine must be removed from the vehicle to properly repair this oil leak.
The high-pressure power steering lines are known to leak.
One or more of the power window regulators (one in each door) may fail causing the window to fall into the door and not roll up.
The air conditioning compressor may become noisy or develop a refrigeration leak, requiring replacement.