1998 Pontiac Grand Prix Owner's Manual - Page 146

If so, be sure to fuel your vehicle with quality fuel (see "Fuel" in the Index). Poor quality will cause your fuel run You engine not to as efficiently as designed. may notice this as stalling after start-up, stalling when you put the vehicle into gear, misfiring, hesitation on acceleration or stumblingon acceleration. (These conditions may go away once the engine is warmed up.) This will be detected by the system and cause the light to turn on. Oil Warning Light If you have a problemih wt your oil pressure, this light may stay on after you start your engine,or come on when you are driving. If you experience one or more these conditions, of change the fuel brand you use. It will require at one least full tankof the proper fuel turn the lightoff. to If none of the above steps have made light turn off, the have your dealer or qualified service center check the The oil light could also come on in two other situations: vehicle. Your dealer has the proper test equipment and 0 When the ignition on but the engine not running, is is diagnostic tools to fix any mechanical or electrical the light will come on a test to show it is as you problems that may have developed. working, but the light go out when you the will turn ignition to START. If it doesn't come on with the ignition on, you may have a problem with the or fuse bulb. Have it fixed right away. 0 This indicates that oil is not going through your engine quickly enough to keep lubricated. The engine could it be low on oil could have some other oil problem. or Have it fixed right away. If you makea hard stop, the light may come on a for moment. This is normal. 2-71