Multiple Sensor Failures Hit Sierra's Auto Features

I had a similar issue with my 2017 Canyon, sounds exactly like what you experienced. As someone with some auto repair experience, I recognized these symptoms as typical light sensor and rain detection system problems. The root cause in my case was bubbles forming under the gel pad where the auto sensor cluster sits behind the windshield. This created interference with the light sensor calibration and affected multiple systems since they share the same sensor unit. The fix involved: Removing the old gel pad, Cleaning the sensor surface, Installing a new sensor pad, Recalibrating the electrical systems Total repair cost was 62 Euro including parts and labor. The electrical fault cleared up immediately after the repair. Before suggesting this is definitely your issue, could you share: Has your windshield been replaced recently? Are there any visible signs of separation or bubbling near the sensor area? Did these issues start gradually or all at once? Have you noticed any warning lights on the dash? This info would help confirm if your situation matches what I experienced with my sensor calibration issues.

Thanks for sharing your experience. Mine has 139706 KM on the odometer and hasnt had the windshield replaced. The issues started suddenly after a heavy rainstorm. No warning lights on the dash, but I can see some discoloration around the sensor area behind the windshield. The car components seem otherwise fine, but the malfunctioning sensor is definitely causing problems across multiple systems. The last service was done just 2 months ago and everything was working perfectly then. Your suggestion about the gel pad makes sense, I noticed some separation near the sensor housing which could be causing these car electronics issues.

Thanks for those details, that discoloration and separation you mentioned sounds exactly like what I found on my Canyon. The gel pad degradation typically happens around the 130000-150000 KM mark, which aligns with your mileage. The sudden onset after heavy rain is a classic indicator that moisture has penetrated the sensor housing. When water gets between the gel pad and sensor, it disrupts the light sensor readings and throws off the entire system calibration. In my case, the service center confirmed that rain exposure accelerated the gel pad deterioration. They found moisture trapped between the sensor components when they removed the old pad. The good news is you caught this early, there is likely no permanent damage to the sensor unit itself. The repair should be straightforward like mine was, mainly focusing on: 1. Replacing the deteriorated gel pad 2. Ensuring proper sensor calibration 3. Checking all connected car electronics The repair costs should be similar to what I paid (around 62 Euro) since its the same sensor system. Just make sure they use the correct OEM gel pad for proper sensor function after installation.

The multiple sensor issues on my Sierra now make more sense after hearing about your experience. The similarity between our situations, especially regarding the gel pad deterioration and sensor calibration problems, gives me a clear direction for the repair. The separation I noticed near the sensor housing, combined with the timing after that rainstorm, matches your explanation perfectly. Since my vehicle is right in that 130000-150000 KM range where these car components typically start showing issues, it makes sense that the gel pad would be failing now. Im going to schedule a repair this week and specifically ask them to check for moisture between the auto sensor and the pad. The 62 Euro repair cost seems reasonable for fixing multiple system issues. Really appreciate you walking through your experience, it helped confirm that Im likely dealing with a sensor fault rather than a more complex electrical problem. Ill make sure they use the proper OEM gel pad during the repair to avoid any future light sensor problems. Good to know this is a relatively straightforward fix that should resolve all the connected system issues at once.