Cruise Control Problems of Cadillac DTS

I bought this car, and the steering wheel controls(audio/cruise control) have not worked, prior owner was advised to replace the bcm. Front driver's headlight intermittently goes on and off when driving. The steering wheel switch to adjust the height, angle, and settings for each driver also are not working. Apparently these are known issues. I had similar issues with my 2000 chevy impala, and my 2004 chevy impala ss.

See all problems of the 2006 Cadillac DTS 🔎.

An example of the cruise control concern is as follows; if the cruise control has been engaged at some speed,lets say 40 mph and then disengaged and the car decelerates to say about 30mph then engage the cruise control again instead of smoothly accelerating back up to the previously set 40 mph the car abruptly accelerates and sometimes downshifts and the speed can go up to 45 or 50 mph before it settles back down to the preset 40mph. This seems to be a very random occurrence and cannot be always duplicated. The speeds at which this can occur are varied. This unexpected acceleration can be very upsetting and I believe in some situations may even present a dangerous situation.

Cruise control does not maintain speed downhills within reason. Freewheel on all downhill grade as fast as gravity allows. Easily can go 15-20 over set speed on normal highway conditions. First vehice owned with this condition. Potential safety and speeding ticket problem. Dealer states thats the way it is. Fix is don't use cruise when there are hills per owners manual.

Cruise control fails to hold set speed at downgrades of 3% or greater. Vehicle continues to increase speed, causing unsafe driving condition. Driver must provide excessive braking to control vehicle speed on downgrades.

This happened 6 times. My engine speed would not drop after foot removed from accelerator. 4 of the six times was on freeway exit ramp. I verified that the floor mat was not in any way interfering after the firstime this happened. I contacted my dealer 3 times - central Cadillac, and they said they checked and found nothing wrong and that it must have been my floor mat. I know it was not! I don't believe this to be cruise control related as it happened in city traffic twice. When exiting the freeway after braking to stop engine would stay at 1800 rpm to 2300 rpm dependent on occasion. The same rpm range was in city also.

My 2006 Cadillac Dts has adaptive cruise control. I have experienced 3 episodes of police radar interference with this feature. The symptom is that the cc indicates that a car is immediately in front of the vehicle. It sounds the alarm and applies the brakes as strongly as the feature allows. The workaround is to immediately hit the gas or kill the cc to get back up to spped and avoid a rear end collision. I had my dealer test the unit and validate the alignment. The unit tested error free. I have experienced the problem with a florida state police car 1 time and hillsbourogh county police cars 2 times. I contacted the county and they took a firm position that it couldn't be their radar units. I frankly don't care where the problem is. If other people are experiencing this it will escalate to a fatality inducing situation. I may alo take the pfoblem to the fcc as this is obviously a bandwidth problem on the part of the police radar units or the Cadillac adaptive cc module. Firsy failure occurred when I was following a police cruiser who was approx 200 feet ahead of me and in the adjacent lane (the one to my right) there was no oncoming traffic and no one within 500 feet to the rear. Without warning my car went into emergenct stop and spunded the proximity warning. I tapped the on/off switch and brought the car up to speed. It has also failed as I pass a police car that is sitting perpendicular to the road. The duration is short as you are rapidly passing thru the radar cone. However, I had this happen on the howard franklin bridge over tampa bay and that is a terrible place of a car to suddenly slow down with no apparant warning. I would venture to guess that few people actually use this feature. It is a fantastic function but it is somewhat complex to use and learn how to anticipate. Please feel free to contact me for additional information. Again, no idea as to which element is a fault.

Failure of cruise control to maintain speed within reasonable boundaries on even minimal downhill grades creates unsafe condition.

The contact owns a 2006 Cadillac Dts. At approximately 55 mph the vehicle accelerated while driving downhill and utilizing the cruise control. The contact stated that the vehicle must be downshifted in order for it to regain normal speed. The contact had taken the vehicle to the dealer several times. The dealer performed a diagnostic and found nothing wrong with the vehicle. The dealer stated that the failure was due to the vehicle's design. The failure mileage was 80, the current mileage was 14,800.

We have contacted Cadillac and they tell us there is no fix for this problem. The dealer has had the car for testing two times for several days. Rich tretheway, the head technician at the weaver dealership in grass valley who drove my car and then explained to us what the car does. Here is what the car does from a driving point of view. When going down hill or trying to slow down, when the car reaches about 25 miles per hour or about 1000 rpm, it then gives itself gas which cause a feeling that one would have if the cruise control was on (it is not). That is; that the car surges forward going up about 600 or 700 rpm. This occurs when I have shifted the car down to 1st or 2nd. Since I live in an area with many hills this happens every time I drive. I shift down to keep the car from going excessively fast down the hills. When I am driving and want to take a curve at 20 to 25 miles per hour, the car many times surges forward while my foot is off the throttle; I have to use the brake continually to get around the curves and down hills at a slow enough speed to be safe. This surging happened once in a parking lot as we were trying to park. Rich was not able to reproduce this problem, but was able to reproduce the other surging problem. The cure for this is as I understand it from rich and one of the owners of weaver is to always drive in overdrive and use the brake instead of shifting down. It also does this in overdrive. I can understand that if there is no mechanical repair that general motors has made for this car then something has to be done to be helpful to us.