If you have an owners manual, this info would be in there as well. It would be easier to read and understand as well, this is the best I can do with copy/paste.
When the Change Engine Oil message in the Driver Information Center (DIC) comes on, it means that service is required for your vehicle. Have your vehicle serviced 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 engine oil life system may not indicate that vehicle service 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 trained service technicians who will perform this work using genuine parts and reset the system.
If the engine oil life system is ever reset accidentally, you must service your vehicle within 3,000 miles (5 000 km) since your last service. Remember to reset the oil life system whenever the oil is changed. See Engine Oil Life System for information on the Engine Oil Life System and resetting the system.
When the Change Engine Oil message appears, certain services, checks, and inspections are required. Required services are described in the following for " Maintenance I" and " Maintenance II.&Quot; Generally, it is recommended that your first service be Maintenance I, your second service be Maintenance II, and that you alternate Maintenance I and Maintenance II thereafter. However, in some cases, Maintenance II may be required more often.
Maintenance I -- Use Maintenance I if the change engine oil message comes on within 10 months since the vehicle was purchased or Maintenance II was performed.
Maintenance II -- Use Maintenance II if the previous service performed was Maintenance I. Always use Maintenance II whenever the message comes on 10 months or more since the last service or if the message has not come on at all for one year.
Scheduled Maintenance Service
Change engine oil and filter. See Engine Oil. Reset oil life system. See Engine Oil Life System. An Emission Control Service.
Visually check for any leaks or damage. See footnote (k).
Inspect engine air cleaner filter. If necessary, replace filter. See Engine Air Cleaner/Filter. See footnote (n).
Rotate tires and check inflation pressures and wear. See Tire Inspection and Rotation and " Tire Wear Inspection" in At Least Once a Month.
Inspect brake system. See footnote (a).
Check engine coolant and windshield washer fluid levels and add fluid as needed.
Perform any needed additional services. See " Additional Required Services" in this section.
Inspect suspension and steering components. See footnote (b).
Inspect engine cooling system. See footnote (c).
Inspect wiper blades. See footnote (d).
Inspect restraint system components. See footnote (e).
Lubricate body components. See footnote (f).
Replace passenger compartment air filter. See footnote (g).
Additional Required Services
The following services should be performed at the first maintenance service (I or II) after the indicated miles (kilometers) shown for each item.
Additional Required Services Service and Miles (Kilometers)
25,000 (40 000)
50,000 (80 000)
75,000 (120 000)
100,000 (160 000)
125,000 (200 000)
150,000 (240 000)
Inspect fuel system for damage or leaks.
Inspect exhaust system for loose or damaged components.
Replace engine air cleaner filter. See Engine Air Cleaner/Filter.
Change automatic transmission fluid and filter (severe service only). See footnote (h).
CTS-V Only: Change 6-speed manual transmission fluid (severe service only). See footnotes (l) and (m).
CTS-V Only: Change hydraulic clutch fluid (severe service only). See footnote (l).
CTS-V Only: Change rear axle fluid (severe service only). See footnotes (l) and (m).
CTS-V Only: Change brake fluid (severe service only). See footnote (l).
Replace spark plugs. An Emission Control Service.
Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i).
Inspect engine accessory drive belt. An Emission Control Service. See footnote (p).
(a) Visually inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect other brake parts, including calipers, parking brake, etc.
(b) Visually inspect front and rear suspension and steering system for damaged, loose, or missing parts or signs of wear. Inspect power steering lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc.
(c) Visually inspect hoses and have them replaced if they are cracked, swollen, or deteriorated. Inspect all pipes, fittings and clamps; replace with genuine GM parts as needed. To help ensure proper operation, a pressure test of the cooling system and pressure cap and cleaning the outside of the radiator and air conditioning condenser is recommended at least once a year.
(d) Visually inspect wiper blades for wear or cracking. Replace wiper blades that appear worn or damaged or that streak or miss areas of the windshield.
(e) Make sure the safety belt reminder light and all your belts, buckles, latch plates, retractors, and anchorages are working properly. Look for any other loose or damaged safety belt system parts. If you see anything that might keep a safety belt system from doing its job, have it repaired. Have any torn or frayed safety belts replaced. Also look for any opened or broken airbag coverings, and have them repaired or replaced. The airbag system does not need regular maintenance.
(f) Lubricate all key lock cylinders. Lubricate all body door hinges. Lubricate all hinges and latches, including those for the hood, rear compartment, console door, and any folding seat hardware. More frequent lubrication may be required when exposed to a corrosive environment. Applying silicone grease on weatherstrips with a clean cloth will make them last longer, seal better, and not stick or squeak.
(g) If you drive regularly under dusty conditions, the filter may require replacement more often.
(h) Change automatic transmission fluid and filter if the vehicle is mainly driven under one or more of these conditions: " In heavy city traffic where the outside temperature regularly reaches 90 F (32 C) or higher.
" In hilly or mountainous terrain.
" When doing frequent trailer towing.
" Uses such as high performance operation.
If you do not use your vehicle under any of these conditions, the fluid and filter do not require changing.
(i) Drain, flush, and refill cooling system. This service can be complex; you should have your dealer perform this service. See Engine Coolant for what to use. Inspect hoses. Clean radiator, condenser, pressure cap, and filler neck. Pressure test the cooling system and pressure cap.
(k) A fluid loss in any vehicle system could indicate a problem. Have the system inspected and repaired and the fluid level checked. Add fluid if needed.
(l) Change fluid if the vehicle is used for high performance operation.
(m) Change fluid whenever the vehicle has been driven for 3,000 miles (5 000 km) with the transmission temperature at 290 F (143 C) or higher without using an auxiliary fluid cooler. See Message Center and Transmission Fluid Hot Message.
(n) If you drive regularly under dusty conditions, inspect the filter at each engine oil change.
(p) Visually inspect belt for fraying, excessive cracks, or obvious damage. Replace belt if necessary.