WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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.