Chevrolet 2001 Tahoe Owner's Manual page 390

Scheduled Maintenance
52,500 Miles (87 500 km)
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Check rear/front axle fluid level and add fluid as needed. Check constant
velocity joints and axle seals for leaking.
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Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
60,000 Miles (100 000 km)
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If Equipped: Replace passenger compartment air filter. If you drive regularly
under dusty conditions, the filter may require replacement more often.
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Check rear/front axle fluid level and add fluid as needed. Check constant
velocity joints and axle seals for leaking.
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Rotate tires. See "Tire Inspection and Rotation" in the Index for proper
rotation pattern and additional information. (See footnote +.)
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Inspect engine accessory drive belt.
An Emission Control Service.
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Replace fuel filter.
An Emission Control Service. (See footnote
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Inspect Exhaust Gas Recirculation (EGR) system as described in the
service manual.
An Emission Control Service.(See footnote
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