Chevrolet 2004 Tracker Owner's Manual page 334

If you do not use your vehicle under any of these
conditions, change the fluid and filter every
100,000 miles (166 000 km).
Rotate tires. See Tire Inspection and Rotation on
page 5-64 for proper rotation pattern and additional
information. (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.
52,500 Miles (87 500 km)
Change engine oil and filter (or every 7.5 months,
whichever occurs first). An Emission Control
Service.
Rotate tires. See Tire Inspection and Rotation on
page 5-64 for proper rotation pattern and additional
information. (See footnote +.)
60,000 Miles (100 000 km)
Change engine oil and filter (or every 7.5 months,
whichever occurs first). An Emission Control
Service.
If Equipped: Replace passenger compartment air
filters.
6-20
Change automatic transmission fluid and filter if the
vehicle is mainly driven under one or more of these
conditions:
− In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change the fluid and filter every
100,000 miles (166 000 km).
Rotate tires. See Tire Inspection and Rotation on
page 5-64 for proper rotation pattern and additional
information. (See footnote +.)
Inspect engine accessory drive belts (or every
30 months, whichever occurs first). An Emission
Control Service.
Drain, flush and refill cooling system (or every
30 months, whichever occurs first). See Engine
Coolant on page 5-25 for what to use. Inspect hoses.
Clean radiator, condenser, pressure cap and neck.
Pressure test the cooling system and pressure
cap. An Emission Control Service. (See footnote †.)
Replace spark plugs. An Emission Control Service.