GMC 2003 Sierra - Manual (Page 398)

Engine Air Cleaner/Filter
The air deaner^itter assernhjy has an índicator^ If
equipped, (hat lets you wtien the engine air
cleaner/hiter is dirty and needs to be serviced. The air
cteaner/lilter indicator is located on Ihg air cleui^er cover.
See Engino Cúirtpartmsni Overview on page 5-12 for
mora information on location.
See Parí B: Checks and Sen/ices on page d- i Í
to deteimmo when to check tho indicator.
The service window A with
the percentage scale
shows the amount
of engine air cleaner/filter
Hta used. When bofri
service window A and
service wlocfciw 0
turn orange, replace the
engine air cleaner/fliter.
The air clsaner/iilter assempty is located on |he front
corner of the engine compartment i>n the passenger’s
side of the vehicle, See Engrne Companfnent Oi/en/i&w
on page 5-12 iot more mformation on Incabon.
After changing the air filter, press me top button on Ihe
indicator lo reset it.
5^23