For 1990-2009 cars

## Additional Required Services Except Aveo, Solstice and Vibe

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 (41 500) | 50,000 (83 000) | 75,000 (125 000) | 100,000 (166 000) | 125,000 (207 500) | 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" in your owner manual. | ·* | · | ·* | · | ·* | ·
Cadillacs only: Replace passenger compartment air filter. See footnote (g). | · | · | · | · | · | ·
Change automatic transmission fluid and filter (except 3.6L G6) (severe service). See footnotes (h) and (o). |  | · |  | · |  | ·
Corvette, Impala, LaCrosse, Lucerne, Grand Prix, 3.6L G6, 3.9L G6, and Cadillacs only: Change automatic transmission fluid and filter (normal service). See footnote (o). |  |  |  | · |  |
STS and SRX all-wheel-drive vehicles used for trailer towing: Change transfer case fluid. |  | · |  | · |  | ·
Replace spark plugs. An Emission Control Service. |  |  |  | · |  |
Corvette, Impala, V6 Malibu, LaCrosse, V6 Lucerne, Grand Prix, and G6 only: Inspect spark plug wires. An Emission Control Service. |  |  |  | · |  |
Except DTS Professional Vehicle: Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i). |  |  |  |  |  | ·
DTS Professional Vehicle: Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i). |  |  | · |  |  | ·
STS and XLR with 4.4L supercharged engine only: Intercooler system service (or every five years, whichever occurs first). See footnote (p). |  |  |  |  |  | ·
Inspect engine accessory drive belt. An Emission Control Service. See footnote (l). |  |  |  |  |  | ·
CTS, STS, and SRX only: If using DOT-4 brake fluid, change brake fluid at a regular maintenance service every two years. See footnote (n). |  |  |  |  |  |

* STS and CTS only