K 1500 Yukon Denali AWD V8-6.0L VIN U (2002)
Air Cleaner Restriction Indicator: Description and Operation
Air Cleaner Restriction Indicator
The air cleaner restriction indicator is located on the air cleaner assembly between the air filter and the mass air flow (MAF) sensor.
If the area inside of the clear section is green, no air filter service is required. If the area inside the clear section is orange and Change Air Filter
appears, replace the air filter.
