1996 GMC Sonoma Owner's Manual - Page 106

NOTICE: If you keep driving your vehicle with this light on, after a while, your emission controls may not work as well, your fuel economy may not be as good and your engine may not run smoothly. as be This could leadto costly repairs that may not covered by your warranty. This light should come on, as a check t o show you it is working. when the ignition is on and the engine is not running. I f the light doesn't co~ne have it repaired. on, This light will a l s o come on during a malfunction in one of two ways: 0 If the LightIs Flashing The following may prevent more serious damage to your vehicle: 0 Reduce vehicle speed. 0 Avoidhard accelerations. Avoid steep uphill grades. If 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. 0 Light Flashing -- A misfire condition has been detected. A misfire increases vehicle emissions and may damage the emission control system on your vehicle. Dealer or qualified service center diagnosis and service is required. Light On Steady -- A n emission control system malfunction has been detected on your vehicle. Dealer or qualified service center diagnosis and service may be required. If the light continues to flash, when it is safe t o do so, s ~ o pl w \vhic*le.Put your vehicle in PARK (P). Turn the f 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. If the light is still flashing follow the previous steps, and drive the vehicle t o your dealer or qualified service center for service. 2-58