Service Engine Soon Light
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1998 GMC Savana Special, 1998 GMC Savana Camper Special, 1998 GMC Savana, 1998 Chevrolet RV Cutaway, and 1998 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
This warning light is part of computerized engine control system, and will flash when a malfunction or trouble code(s) exists. As a bulb check, light will come on when ignition is turned on. If no problem exists, light will go out when engine is started.