Your GTO has an Oil Life System incorporated into its computer. While the computer thinks it knows when you should have your oil changed chances are you use the motor as it was intended. So we recommend that you check your oil often and change it every 3,000 miles depending on driving and racing habits.
This is the reset info for that system, which is located in your owners manual.
How to Reset the Service 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
Service Engine Oil message being turned on, reset the
After changing the engine oil, reset the system by
performing the following steps:
1. With the engine off, turn the ignition key to ON.
2. Fully press and release the accelerator pedal slowly
two times within five seconds.
This is an error and really should be press and
release accelerator pedal slowly three times within
3. Turn the key to LOCK.
If the Service Engine Oil message comes back on
when you start your vehicle, the engine oil life
system has not reset. Repeat the procedure.