Chevrolet Aveo 2007 Owner's Manual page 302

Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated,
inspect brake pads for wear and evenly tighten
wheel nuts in the proper sequence to torque
specifications in Capacities and Specifications on
page 368.
If you have rear drum brakes, they do not have
wear indicators, but if you ever hear a rear brake
rubbing noise, have the rear brake linings
inspected immediately. Also, the rear brake drums
should be removed and inspected each time
the tires are removed for rotation or changing.
When you have the front brake pads replaced,
have the rear brakes inspected, too.
Brake linings should always be replaced as
complete axle sets.
See Brake System Inspection on page 395.
302
Brake Pedal Travel
See your dealer/retailer if the brake pedal does
not return to normal height, or if there is a
rapid increase in pedal travel. This could be a sign
that brake service might be required.
Brake Adjustment
Every time you make a moderate brake stop, the
disc brakes adjust for wear. If you rarely make
a moderate or heavier stop, then the brakes might
not adjust correctly. If you drive in that way,
then — very carefully — make a few moderate
brake stops about every 1,000 miles (1 600 km),
so the brakes will adjust properly.
If the brake pedal goes down farther than normal,
the rear drum brakes might need adjustment.
Adjust them by backing up and firmly applying the
brakes a few times.