1998 Chevrolet Venture Owner's Manual - Page 211

If the Light Is Flashing The following may prevent more serious damage to your vehicle: Reducing vehicle speed. 0 0 Avoiding hard accelerations. Avoiding steep uphill grades. If so, reinstall the fuel cap, making sure to fully install the cap.The diagnostic system can determine if the fuel A loose or cap has been left off or improperly installed. missing fuel cap will allow fuel to evaporate into the atmosphere. A few driving trips with the cap properly installed shouldturn the lightoff. Did you just drive througha deep puddle of water? If so, your electrical system may be wet. The condition will usually be corrected when the electrical system dries out.A few driving trips should turn the light off. Are you low on fuel? As your engine starts to run out of fuel, yourengine may not run as efficiently as designed since small amounts of air are sucked into the fuel line causing a misfire. The system can detect this. Adding fuel should correct this condition. Make sure to install the fuel cap properly. It will take a few driving trips to turn the light off. Have you recently changed brands of fuel? If so, be sure to fuel your vehicle with quality fuel (see "Fuel" in the Index).Poor fuel quality will cause your engine not to run as efficiently as designed. You may notice this as stalling after start-up, stalling when you put the vehicle into gear, misfiring, hesitation on acceleration or stumbling on acceleration. (These conditions may go away once theengine is warmed up.) If you are towing a trailer,reduce the amount of cargo being hauled as soon as it is possible. If the light stops flashing and remains on steady, see "If the Light Is On Steady" following. If the light continues to flash, when it is safeto do so, stop the vehicle. Find a safe place to park your vehicle. Turn the key off, wait at least 10 seconds and restart the engine. If the light remains on steady, see "If the Light Is On Steady" following. Ifthe light is still flashing, follow the previous steps, and drive the vehicle to your dealer or qualified service center for service. If the LightIs On Steady You may be able to correct the emission system malfunction by considering the following: Did you recently put fuel into your vehicle?