The Side Blind Zone Alert indicator on some 2021-2023 CT4, CT5, Escalade, Tahoe, Suburban and Yukon models equipped with Super Cruise (RPO UKL or UKL and 00U/02O) may not operate properly when passing other vehicles after a Short Range Radar (SRR) Rear Side Sensor module has been replaced.
The Side Blind Zone Alert system can provide an alert on the side mirrors when a moving vehicle is detected in a side blind zone of an adjacent lane. (Fig. 11) The system uses two control modules: the B233SL Short Range Radar Sensor Rear Side Sensor – Left and the B233SR Short Range Radar Rear Side Sensor – Right located behind the fascia in the rear corners of the vehicle.
Fig. 11
After a rear side SRR module (Fig. 12) has been replaced, the Size Blind Zone Alert (SBZA) indicator may not illuminate in the side mirrors when the customer drives past a vehicle. However, the alert indicator will illuminate when another vehicle is passing the customer. This condition will only be present after an SRR module is replaced using part number 84907387.
Fig. 12
To address the Side Blind Zone Alert indicator condition, the system should be reset. On the infotainment screen, go to Settings > System > Return to Factory Settings.
The reset of the factory settings will reset the modules to allow the Side Blind Zone Alert system to operate properly when passing or being passed by a vehicle.
Refer to #PIT5969 for more details, including part numbers.
– Thanks to Jim Will
