2015 Chevrolet Suburban: adaptive cruise control problems

Filed Jan 30, 2024 · Brakes, Driver assistance · NV

I purchased my vehicle after the recall 19V‑645 regarding the brake pump was issued. My vehicle was a part of that safety recall, and the module was reprogrammed in September 2019 (N192268490-01). The pump has not been previously replaced according to service records. I purchased my vehicle from a dealership in April 2021. I recently (late 2023) started having issues with my brakes, having increased brake pedal effort, a hard brake pedal, and increased stopping distance. I have had the brake assist alert come on several times. The issue happens more frequently at lower speeds. My park assist alert also comes on regularly when applying the brakes. I have taken my vehicle to GM several times regarding the park assist issues, but they have only cleared the computer codes and cannot figure out why they keep coming back, as there is no detectable issues with the system. I have also brought my vehicle in due to the adaptive cruise control, as it has also caused issues while using it. It will often apply brakes if it detects a vehicle in another lane while driving, causing the vehicle to “slam” on the brakes going at high rates of speed (I.e. driving on the interstate at 80 mph) and has nearly caused accidents, as the vehicle becomes hard to control, and the risk of following vehicles not having the reaction time to avoid a rear-end collision is increased. My particular vehicle does not have an option to switch between regular cruise control, and adaptive cruise control. After talking with GM, they informed me the only way to “fix” the issue is to completely replace the module with an updated module that allows the option to turn off the adaptive cruise control, which is quite costly to the consumer. My vehicle is currently at a GM service department, and has been diagnosed that the brake pump has failed, and needs replaced. They are claiming that it is not covered under the recall. It is not covered under GM’s extended warranty due to mileage restrictions.

Filed Aug 3, 2023 · Transmission · VA

While traveling on a busy highway with cruise control on the rpms would go up about 2,000 then drop back down to normal. This happened all the way home (1hr 30min). No lights on dash or warning went on. Then when I was back in the city, I was at a stoplight turning left and pressed the gas it engaged and started to move and then the rpms shot up to 4,000 and the car didn't go. No warning lights, messages appeared.

Filed Sep 3, 2019 · Driver assistance, Electrical · 92,800 miles · AL

When traveling at slow speeds, I.e., parking lot or restaurant drive-thru line, and making sharp turns, car stabilitrak warning will flash then loss of power steering and complete loss of power will result. Additionally, the media electronics will shut off and restart periodically. This doesn't necessarily happen at the same time, although, this never happens when I am not having problems with the stabilitrak system. (see previous complaint: 11122704) took car for service at capitol chevy on 8/30/19. They said no codes were indicated, however, throttle body was dirty and could have an effect on my issue. Throttle body was serviced/cleaned. On sept. 2, 2019 I had issue with media system and stabilitrak. While traveling southbound on I-85, cruise control set approx. 75 MPH, I braked to disengage cruise speed when media system reset. I pulled into my driveway approx. 20 minutes later and while traveling at slow speed and turning in my driveway, the stabilitrak warning came on resulting in loss of power steering. I was nearly at a stop when it happened. Sometimes when the car loses power in these situations it will have to be jumped off to restart. Which happened prior to being serviced on 8/28/19. I read about similar stories on chevy message boards related to 2015 models,

Filed May 7, 2019 · Driver assistance, Electrical · 60,000 miles · IN

While driving at speed with cruise control on all lights flicker and when activating a turn signal power flashes shutting down cruise control and all accessories (dvd player, radio, etc..). Also loss of power steering. Randomly while driving also get service stablitrak and park assist warnings

Filed Dec 26, 2017 · Brakes · 62,100 miles · FL

While traveling straight at 70 MPH on the highway in my 2015 chevy suburban (62k miles) the vehicle experienced a sudden and undetected complete brake system failure. As I approached slowing traffic with the cruise control on, I tapped the brakes to disengage the cruise control, only to find that the brake pedal was rigid and could not be depressed. To avoid a collision at a high rate of speed I swerved onto the right shoulder while using two legs to aggressively push the brake pedal down - all the while feeling very little braking action. The car came to a stop after about 75 meters. At no time before or during the event did the car signal a braking system problem. In fact it still showed no system indicator of a brake problem 3 days later when it was delivered to the dealer for diagnosis. The car has been well maintained, having just undergone a 60k mile service at the dealership. The lack of the vehicle's recognition that a critical failure in the braking system had occurred posed a serious and immediate threat to passengers and surrounding traffic. As a physician I can attest that a collision at that speed would have severely injured or even killed those involved. This problem with the 2015 chevy sub has reported to the federal safety agency before - this is not an isolated event. The service center reported to me that a vacuum pump failure was to blame - I believe this is a more complex engineering problem in that the vehicle did not detect a problem despite the failure creating a life threatening scenario. Although I plan to immediately dispose of this car, failure to address this problem by the manufacturer will put others at risk in the future. Gm appears to have issued a service bulletin that refers to this problem (attached). I sincerely believe this defect will result in lives lost if left unaddressed. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).