Hummer 2005 H2 - Manual (Page 331)

How to Inspect
Vehicles with an Air Filter
Restriction Indicator
Locate the air filter restriction indicator on the engine air
duct. When the indicator turns black or is in the
red/orange “change” zone, replace the filter and reset
the indicator. See “Replacing the Engine Air
Cleaner/Filter and Resetting the Air Filter Restriction
Indicator” later in this section for further instructions.
Vehicles without an Air Filter
Restriction Indicator
To inspect the air cleaner/filter, remove it from the
vehicle and lightly shake the filter to release loose dust
and dirt. If the engine air cleaner/filter remains caked
with dirt, a new filter is required. See “Replacing
the Engine Air Cleaner/Filter and Resetting the Air
Filter Restriction Indicator” later in this section for
further instructions.
Inspecting the Engine Air
Cleaner/Filter and Resetting the
Air Filter Restriction Indicator
1. Loosen the screws on the engine air
cleaner/filter cover.
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