EVAP Control System Diagnosis
WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
For EVAP control system diagnosis, see appropriate INSPECTION/MAINTENANCE PROCEDURES in under DRIVE CYCLES in SELF-DIAGNOSTICS - 3.4L MONTANA, SILHOUETTE & VENTURE article.