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Message: <blockquote data-quote="mars2878" data-source="post: 28362" data-attributes="member: 12483">Here it is in English so that others dont have to translate it.Stutaeng said:"The small indicator for the airbox condition was also removed. I don't remember exactly when that happened. Perhaps that was only the case with the 1999 to 2002 models? Only my '99 still has it. You can simply replace the lid if you want to put it back on. Honestly, I never figured out how to use or read the little thing."MyMarco1973 said:My 2000 Silverado still has it. It is vacuum-operated. If the air filter is dirty, the vacuum pressure increases, pulling the indicator into the red zone. To reset it, you have to press the button at the top.</blockquote>