Diagnostic Aids
WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
Inspect for the following:
- Restrictions in MAP sensor vacuum source.
- MAP sensor seal is missing or damaged.
- Vacuum hoses disconnected, damaged, or incorrectly routed.
- Intake manifold vacuum leaks.
- Vacuum leaks at throttle body.