Why is the oil change light still on after I change in the oil in my GM truck/Silverado. How can I reset it?
A. Most GM vehicles feature Flexible Service System (FSS) oil monitoring chips in their engine’s computers that activate the gauge lights that indicate you should “change oil.” FSS is based on such things as motor revolutions and number of stops and starts. If the mechanic did not reset the light, it will stay lit after an oil change. Solving the problem is easy: turn the ignition on without starting the engine and press the accelerator up and down three times within five seconds. This should reset the light.
