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Park assist sensors are part of the park assist system, just one of many advanced driver assistance systems (ADAS) found on vehicles today. Damaged sensors are typically replaced and may require painting to match the vehicle. Vehicle makers often provide information on the painting of new sensors. Some vehicle makers do not recommend refinishing sensors with minor finish damage because excessive paint thickness may adversely affect the operation of the park assist system. However, other vehicle makers allow refinishing and provide guidelines. Let’s see what General Motors (GM) has to say.
According to vehicle-specific GM repair manuals, the Parking Assist Alarm Sensor Replacement procedure states, "Do not refinish previously painted sensors. Excess paint buildup will cause the sensor to be inoperative."
It is also important to note that new sensors come prepped to be painted, and that special care should be taken not to scratch the sensor. The procedure also provides additional guidelines regarding prepping, masking, and mil thickness.
Follow OEM procedures and warnings to help ensure a complete, safe, and quality repair.
For additional GM information, check out the following pages:
Chevrolet OEM Information
GMC OEM Information
Buick OEM Information
Cadillac OEM Information
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Article validated in 2025