Buick Regal adaptive cruise problems

Filed Oct 12, 2023 · Brakes, Driver assistance · TN

I was driving on the interstate going up the mountain and my 2017 Regal started to choke going up the incline. I was pressing my gas to the floor and nothing when this happened I quickly pulled off to the side when I tapped my brakes they felt as if I was pressing on a concrete block. I was able to stop but it was pretty scary. I had no cell phone reception going up this mountain in the dark late at night, I had to slowly drive the car home which was a good 20 minutes to go. Turns out according to my dad my brake vacuum pump busted apart so he replaced the part, he bought a GM certified part. This happened again just this past week it’s been a month and a half since the first incident. I had to spend $600 on the same part and I took it to the dealership this time. The mechanic said the part I had gotten must’ve been a faulty part he couldn’t see what the issue was and why it again for the 2nd time going up the same mountain pretty much at the same spot it happened the first time. The only difference was this time I had no other issues happening I was using cruise control hardly used my brakes the entire trip when I pulled off the exit I tapped my brakes and again it was like I was pressing on concrete. Seems odd that this happened so close together. I’ve had a lot of issues with this car once it hit 100k in miles. Electrical issues, just weird random things happen briefly and then it’s fine.

Filed Jan 31, 2022 · Driver assistance, Electrical · CA

When using adaptive cruise control, this vehicle will allow you to get close to the vehicle in front of you and aggressively apply brakes which throws you forward. The dealer has looked at this vehicle several times for this issue, changed several sensors but the problem still still exists. Because of this issue I cannot use my Adaptive Cruise Control.

Filed Jun 22, 2020 · Brakes · 120,000 miles · MI

Brake pedal will not return fully after it is applied when it is warm and humid. Causes brake pedal to stick and not allow cruise control to be selected. The stuck pedal allows the car to be started and placed into gear without a foot on the pedal. Did find that gm has not only issued a technical service bulletin for the described issue but has issued multiple revisions to cover additional vehicles each time. Given that this is a well known issue by the manufacture, this should warrant a serious looking into a recall issue. Tsb # pic5692d dated 05/11/2018 is the fourth revision and the original tsb pic5692 is dated july, 2012. Tsb pic5692d even states that a product review is required.

Filed Dec 17, 2017 · Acceleration, Electrical · FL

The electrical system on the drivers front door is faulty I went through three master window switch's and still something wrong. The cruise control has fault even after some sensors replaced. And the digital odometer display quit working but the rest of the gauges still work the odometer quit showing after 115k. The driver side electrical quit working one day while driving on the highway, the new master switch when you press the button it unlocks and locks the doors. The cruise control quit working in or around 98k miles. And the digital odometer and the other digital screen started to fade and eventually just stopped showing after 115k miles.

Filed Aug 16, 2017 · Acceleration · 13,600 miles · OR

Car applied brakes suddenly and fully 4-5 times during 200 mile trip on I-5 for no apparent reason while adaptive cruise control was on at freeway speeds (65-70mph). It occurred randomly, while following other vehicles, including semi-trucks, which are not in same lane and/or are significant distance away. Did so without any driver input or application of brakes. Decreased speed was so sudden, it caused driver's seat belt to tense up. Fortunately, there were no vehicles directly behind mine or my car would have been rear-ended at freeway speeds, resulting in potential serious injury. I took car to dealer where it was purchased (royal moore auto center, hillsboro, oregon (503‑648‑1153) on 8/9/17 and left it for day. Their technicians ran codes and drove car, but could not duplicate problem. (invoice # bucs780125). I was referred to buick (800‑521‑7300) and it referred me to gm senior advisor team. Was assigned service request #8-3144154519. I spoke to service representative "christi", who told me there was nothing they could do unless the service technicians could duplicate the problem. Her only suggestion was that I return to the dealer to see if they could do that. I told her since the problem did not occur all the time, but only some of the time, that made no sense. I asked to speak with someone at gm who might have technical knowledge about this dangerous problem. She said she could not refer me to anyone at gm for that purpose. I told her (and later a second senior advisory team member- who are independent contractors and not gm employees), that I had found websites that discussed other owners of gm vehicles equipped with the forward collision alert and braking system and adaptive cruise control, ie, automatic braking systems, experiencing similar problems- their vehicles braked at the wrong time for no apparent reason. The federal safety agency needs to look into this asap.

Filed Jun 23, 2016 · Brakes, Engine · 98,000 miles · MO

My brake pedal is sticking causing my car to stall and my cruise control not to work, I have to manually pull my break pedal back up after I use my brakes while driving. My car is also just dying with no warning, while driving down the interstate. My lights, and radio will stay on when this happens, but my air conditioner and engine will cut off. It has happened over a handful of times in the last 3 weeks, it's gotten to the point that I am scared to drive it anywhere.

Filed Mar 9, 2015 · Acceleration, Brakes · 74,000 miles · IN

My cruise control and brake lights stopped working after having a recall fixed on my 2011 buick regal. The recalls that were fixed were an oil life monitor control module and a turn signal control module. After having this fixed, my cruise control and brake lights no longer are working. I was pulled over by a policeman, otherwise I did not know they were not working while I was driving. The brakes will come on once I depress the brake pedal all the way to the floor of the car, but not while driving in normal conditions. I could have been rear ended several times, as there was no indication that the lights were not working.

Filed Feb 26, 2015 · Electrical · 151,000 miles · OH

Key sticks in ignition. Ignition switch failure caused loss of HVAC system, cruise control and rear window defogger.

Filed Dec 30, 2014 · Acceleration · 124,702 miles · KY

I was traveling on the expressway at 70 MPH and I set the cruise control the vehicle was accelerating up a hill and then continued to accelerate to about 90 MPH before I noticed what was really happening. It took a lot of effort to get the vehicle stopped and when I put the vehicle in neutral it kept the throttle open and was revving the engine. When I got the vehicle in park and popped the hood to check throttle cables it finally released and started to idle normal again.(the cruise control system was shut off as soon as I noticed the problem but did not change the way the car was acting.)

Filed Dec 14, 2014 · Acceleration · 52,000 miles · MI

The first time it happened was on the interstate and I had set the cruise control and my speed started to increase slowly at first then it increased at a rapid rate.so I tapped the brake and it disengaged . When I reengaged it the same thing happened. It has happened sporadically and because it happens infrequently I haven't gotten it repaired and when I have asked mechanics about it, they drive it and it works fine.I cant believe I am the only one this has happened to.