1994 Chevrolet Astro Owner's Manual - Page 118
1994 Chevrolet Astro Manual
Page 118 highlights
Malfunction IndicatorLamp (SERVICE ENGINESOON) This lightis on the right-hand side of your standard cluster. If you have the digital cluster, it is on the left-hand side. A computer monitors operation of your fuel, ignition and emission control systems. This light should come on when the ignitionon, butthe engine is is on not running, as a check show you it is working. If it does not come at to all, haveit fixed right away. If stays on, or comes on while you it it are driving, the computer indicating that you have a problem. should is You take your vehicle in service soon. for NOTICE: If you keep driving your vehicle with this light on, after a while the emission controls won't work well, your fuel economy as won't be as good and your engine may not as smoothly. This run could lead to costly repairs not covered your warranty. by 2-58