Silverado SS AWD V8-6.0L VIN N (2003)
Air Filter Element: Testing and Inspection
The air cleaner restriction indicator is located on the air cleaner assembly between the air filter and the mass air flow (MAF) sensor.
Air Cleaner Restrictor Indicator
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If the area inside of the clear section is green, no air filter service is required.
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If the area inside the clear section is orange and Change Air Filter appears, replace the air filter.