At www.Chevrolet.com you can sign up and see your owner's manual free online. Here is what it says about resetting that light:
6-16 How to Reset the Change Engine Oil Message The GM Oil Life System_ calculates when to change your engine oil and filter based on vehicle use. Anytime your oil is changed, reset the system so it can calculate when the next oil change is required. If a situation occurs where you change your oil prior to a change engine oil message being turned on, reset the system. 1. With the ignition key in RUN but the engine off, repeatedly push the trip/reset button until OIL is displayed on the Driver Information Center. 2. When OIL is displayed, push and hold the trip/reset button for five seconds. The number will disappear and be replaced by 100 (indicating 100% oil life remaining). 3. Turn the key to OFF. If the change engine oil message comes back on, the engine oil life monitor has not reset. Repeat the procedure.