Conditions for Clearing the DTC
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
B320A 39
If the DTC is current, the appropriate window motor must be replaced before the DTC can be cleared.
B320A 42
The affected power window motor must be programmed before the DTC can be cleared.
B320A 4B
The affected power window motor must be calibrated before the DTC can be cleared.