Chevrolet Tracker 2003 Owner's Manual page 328

Change differential fluid.
Replace fuel filter (or every 30 months, whichever
occurs first). An Emission Control Service.
(See footnote †.)
Inspect propeller shafts and U-joints for looseness
and damage (or every 15 months, whichever
occurs first). Inspect more frequently if used off-road
or for pulling a trailer. Tighten U-joint flange bolts
if necessary.
93,000 Miles (155 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
96,000 Miles (160 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
If Equipped: Inspect passenger compartment
air filters.
Rotate tires. See Tire Inspection and Rotation on
page 5-60 for proper rotation pattern and additional
information. (See footnote +.)
6-16
99,000 Miles (165 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
100,000 Miles (166 000 km)
If you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transmission fluid, change
both the fluid and filter.
120,000 Miles (200 000 km)
Replace evaporative emission canister and air
suction filter (or every 120 months, whichever occurs
first). An Emission Control Service.