Chevrolet Tavera Owner's Manual page 118

Maintenance schedule
I: Inspect and correct or replace as necessary
R: Replace or change
(Use odometer reading or months, whichever comes first)
* Under severe conditions, additional maintenance is required
Refer to "Maintenance schedule under severe conditions"
T: Tighten to specified torque
x 1,000 km
A: Adjust
L: Lubricate
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