Kilowatt said:
I read in the '06 owner's manual that the interval is 3000 miles. I would surmise that the DIC is programmed to remind the viewer at 3k intervals based on the odometer, assuming you reset the counter when you did the maintenance. The manual also sez no oil condition sensor and that you have 600 miles to change after the indicator appears.
I have no idea where you read that in the 06 owners manual. But mine says that there isn't a specific amount of miles of when an oil change needs to be done.
Directly from my manual...
Engine Oil Life System When to Change Engine Oil
Your vehicle has a computer system that lets you know when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving conditions, the mileage
at which an oil change will be indicated can vary considerably. For the oil life system to work properly, you must reset the system every time the oil is changed.
When the system has calculated that oil life has been diminished, it will indicate that an oil change is necessary. A change engine oil message in the DIC
will come on. Change your oil as soon as possible within the next 600 miles (1 000 km). It is possible that,
if you are driving under the best conditions, the oil life system may not indicate that an oil change is necessary for over a year. However, your engine oil and filter
must be changed at least once a year and at this time the system must be reset. Your dealer has GM-trained service people who will perform this work using genuine GM parts and reset the system. It is also important to check your oil regularly and keep it at the proper level.
If the system is ever reset accidentally, you must change your oil at 3,000 miles (5 000 km) since your last oil change. Remember to reset the oil life system whenever the oil is changed.
How to Reset the Engine Oil Life
System and the Oil Life Indicator
The Engine 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 in the DIC being turned on, reset the system.
After the oil has been changed, the change engine oil message and the oil life indicator must be reset. To reset the message and indicator, use one of the following procedures:
KOT