Chevrolet Volt shift to park message issue resolved with part replacement on Chevrolet Volt

Some Chevrolet Volt owners report experiencing the "Shift to Park" issue, where the dashboard indicates the vehicle is in park but fails to turn off, prompting a persistent message to shift to park. This problem can start as intermittent but tends to worsen over time. The resolution involves replacing a specific black microswitch located in the automatic transmission shift lever. As a temporary workaround, some owners find that squeezing the lock/release button on the shifter handle an extra time can help the vehicle recognize it is in park. This issue is not exclusive to the Chevrolet Volt, as it also affects other GM models like the Blazer, Malibu, Traverse, and Acadia from model years 2016 to 2019. In certain instances, replacing the shifter/switch may not fully resolve the issue, but a new resistive harness has been identified as an effective solution to prevent the failure.