Brake Pedal Travel; Brake Adjustment - Chevrolet 2008 T Series Owner's Manual

Four-Wheel and Six-Wheel Drum
Brakes (Air Only)
The brake drums should be removed and inspected
each time the tires are removed for rotation or changing.
When you have the front brakes replaced, have the rear
brakes inspected, too.
Brake linings should always be replaced as complete
axle sets.

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 brake stop, the brakes adjust
for wear.
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Brake Adjustment on Air Braked Vehicles
Your vehicle has automatic slack adjusters. Every
time you make a brake stop, the brakes automatically
adjust for wear. Slack adjusters should never be
manually adjusted to correct excessive brake chamber
pushrod stroke. Excessive brake chamber pushrod
stroke means that the brake system needs to be
serviced by a qualified service technician.
Notice: Do not manually adjust automatic slack
adjusters. Manual adjustment of the automatic slack
adjusters can result in a degradation of the slack
adjuster performance over time. If the brake
chamber pushrod stroke is out of adjustment, the
brake system needs to be serviced by a qualified
service technician.