Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

A short to battery in the park lamp relay control circuit is no longer detected by the BCM when the park lamp relay is commanded to energize. After the fault is removed the ignition must be cycled to clear the code.
A history DTC B2588 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
The BCM receives a clear code command from the scan tool.