Exhaust Gas RECIRCULATION
WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Use protective gloves, or allow exhaust system to cool, before servicing exhaust system components.
NOTE:
For EGR system diagnosis, See INSPECTION/MAINTENANCE SYSTEM CHECK
under DRIVE CYCLES in SELF-DIAGNOSTICS - 4.0L AURORA article.