If owners of a wide range of GM vehicles, including 2021 through 2025 nameplates from Cadillac, Chevy, and GMC, find that the Super Cruise semi-autonomous driver assist feature (RPO code UKL) is inoperative, the fault is likely to lie with aftermarket equipment installed on the vehicle.
According to GM Bulletin number PIT6243, the only way to fix the issue is to remove all aftermarket audio parts and accessories from the affected vehicle, returning it to a stock configuration.
The potentially affected vehicles with non-operating Super Cruise include the following, as listed by the bulletin:
- 2021 through 2024 Cadillac Escalade
- 2022 through 2024 Chevy Silverado 1500
- 2021 through 2024 Chevy Suburban
- 2021 through 2024 Chevy Tahoe
- 2022 through 2025 GMC Hummer EV Pickup
- 2024 through 2025 GMC Hummer EV SUV
- 2022 through 2024 GMC Sierra 1500
- 2021 through 2024 GMC Yukon
Vehicles that are affected by the problem will display a “Super Cruise Unavailable” message, and Super Cruise will fail to function in these units as well. Furthermore, audio diagnostic trouble codes (DTCs) will be generated by the problem.
The problem, according to GM, could be caused by aftermarket audio equipment installed in the vehicle. Two examples of the type of components that can trigger the issue include third-party amplifiers and third-party subwoofers, though any aftermarket audio part potentially interfering with Super Cruise chimes can cause the driver assist system to fail.
The only remedy is to remove all installed aftermarket audio components from the vehicle, returning it to the stock audio equipment configuration. This action should solve the problem and return Super Cruise to normal operability. Service personnel should visually inspect for aftermarket parts, as well as checking the K124 Image processing module for “Super Cruise disable,” history data
and “chime alert unavailable.”
Unfortunately for owners of affected vehicles, the use of aftermarket components does not fall under General Motors warranty. Therefore, the removal of third-party audio components and return of the audio system to stock configuration will need to be paid for fully out of pocket by the current owner.
Comments
Now this is the perfect example of how technology has developed into going too far. New vehilces today are just too complex and computerized that Jonny down the street at the audio store just can’t work with them. Now think down the road and what will happen to the third or fourth owners who can’t have service work done without taking them to the selling dealer. But this also brings up a problem that GM (and others) now have. They need to step up their game with the audio systems. For the price they put on them, then can’t be so cheap and stick a 40 grand and higher vehicle with 6 cheap speakers with no power. Perfect example? The new Equinox EV. No matter if the base model at 35 grand or the maxed out RS at about 50 grand. Either way you get the same cheap 6 speaker system.
So if they don’t want people doing stuff like this, then they need to step it up and put better sound systems in to start.
LOL
Sounds like there is a price to be paid for a rolling “BOOM” box.