Conditions for Setting the DTC
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
B2580 01
Will set if there is a short to voltage in the high beam relay control circuit
B2580 06
Will set if there is an open or short to ground in the high beam relay control circuit