GM Service Manual Online
For 1990-2009 cars only

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.

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Inspect exhaust system for loose or damaged components.

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Except ZR1: Replace engine air cleaner filter. See Engine Air Cleaner/Filter .

 

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ZR1 Only: Replace engine air cleaner filter. See Engine Air Cleaner/Filter .

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Change automatic transmission fluid and filter (severe service). See footnote (h).

 

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Change automatic transmission fluid and filter (normal service).

 

 

 

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Replace spark plugs and inspect spark plug wires. An Emission Control Service.

 

 

 

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Engine cooling system service (or every five years, whichever occurs first). An Emission Control Service. See footnote (i).

 

 

 

 

 

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ZR1 Only: Intercooler system service (or every five years, whichever occurs first). See footnote (n).

 

 

 

 

 

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Inspect engine accessory drive belt. An Emission Control Service. See footnote (l).

 

 

 

 

 

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Change clutch hydraulic fluid at a regular maintenance service every two years. See footnote (m).