Section 18 (Engine Control System Self-Diagnostics - Diesel): Summary
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2000 GMC Savana Special, 2000 GMC Savana Camper Special, 2000 GMC Savana, 2000 GMC Pickup, and 2000 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
If no hard or intermittent DTCs, or driveability symptoms exist, proceed to appropriate TROUBLE SHOOTING - NO CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.