Some 2024 Chevy Blazer EV owners may experience an issue wherein their vehicle’s windshield wipers only operate at the highest speed setting, without functioning at slower or intermittent speeds. This problem has been identified as the result of installation of an incorrect component related to the vehicle’s moisture and light sensor system. Now, GM has outlined what dealers must do to correct the issue.
GM released details of the Chevy Blazer EV wiper speed fix in service bulletin PIT6226, which was initially published on August 23rd, 2024. The bulletin indicates that the wiper malfunction stems from the installation of an incorrect B117A Windshield Outside Moisture Ambient Light and Humidity Sensor. This sensor is responsible for detecting moisture and adjusting the wipers’ speed accordingly, specifically for those models equipped with the Rainsense intermittent windshield wiper feature (RPO code CE1), including the Chevy Blazer RS. However, in some cases, a sensor meant for a vehicle without Rainsense was installed, leading to the wipers only functioning at high speed. The Chevy Blazer LT, for example, is equipped with front intermittent windshield wipers (RPO code C23) without Rainsense.
This issue could potentially affect all drivetrain configurations of the 2024 Chevy Blazer EV, while the bulletin listed above is specific to vehicles in North America.
In order to correct this issue, GM recommends that a certified GM dealer checks the part number on the B117A sensor. If the wrong sensor is installed, the dealership will replace it with the correct sensor based on the GM Electronic Parts Catalog (EPC). If the correct sensor is already in place, further diagnostics will be required to identify any other potential issues.
This relatively simple fix should resolve the problem and restore full functionality to the wiper system, allowing it to operate across all speed settings, including intermittent.
As a reminder, the Chevy Blazer EV rides on the GM BEV3 platform and features GM Ultium Drive motors and GM Ultium batteries. Production takes place at the GM Ramos Arizpe plant in Mexico.
Comments
And, MORE issues with THIS half-baked mess.
“This problem has been identified as the result of installation of an incorrect component related to the vehicle’s moisture and light sensor system.”
Dear Industry: put a MANUAL SWITCH on the STEERING COLUMN, and we the drivers will be able to figure it out like we aways have. No need for an over-engineered “moisture and light sensor system” for this.
Better a manual system that works, than an automated one already having problems.
“EV owners do not need to visit dealers” LOL