The speedometer or other instrument panel gauge may begin to work erratically at times. Our technicians tell us that the instrument cluster must be sent to a repair facility to correct this fault. The warranty has been extended on some of these units to 7 years or 70,000 miles.
Problems for specific Cadillac models:
Car problem reports
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Most reported Cadillac problems
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 with anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The key and ignition lock cylinder should be replaced to correct this condition.
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
The fuel pump may fail causing the engine to stall and not restart.
The engine may develop an oil leak 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 steering wheel position sensor may fail, resulting in the service stability message being displayed.
The parking brake may not release automatically due to a failed vacuum switch or actuator. Our technicians tell us that if vacuum is supplied to the actuator when the transmission is in gear, the vacuum switch is functioning and replacing the actuator should correct this concern.
The front turn signal and and daytime running light bulbs are prone to premature failure. Our technicians tell us that these bulbs can be very difficult to replace.
On the 2003's there is a plastic panel that covers the backup lights...it's about 1'X 3'...I guess it's common for these to just blow off. We just purchased the 03 CTS with only 41000 miles and had driven it for about 2 weeks when we noticed the panel was gone,exposing the backup lights. We choose to fix it right instead of trying to find a replacement at the salvage yard (since it seems to be design flaw because they about non exsistant). S...
The crankshaft position sensor may fail causing the engine to stall while driving and/or will crank but not start, especially when the engine is warm. The car may start again if it is left to cool off, but it may run roughly or have poor performance.