WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
An intermittent open/shorted solenoid DTC can be set by several different internal EBCM problems.
Replace the EBCM if an open/shorted solenoid DTC continues to set intermittently.