Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for the following conditions:
- Restrictions in the MAP sensor vacuum source.
- Vacuum hoses disconnected, damaged, or incorrectly routed.
- Intake manifold vacuum leaks.
- Vacuum leaks at the throttle body.
- If an intermittent condition exists, see INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.