Chevrolet 2008 T Series Owner's Manual page 62

Once the parking brake is applied, slowly remove your
foot from the regular brake pedal, while checking to see
if the vehicle moves. If the vehicle does start to move,
press the regular brake pedal and follow the parking
brake burnish procedures. See Parking Brake Burnish
Procedure on page 2-26 for more information.
If your parking brake still does not set, take your vehicle
dealer/retailer for service.
To release the parking brake, first push down the
regular brake pedal. Then, while pressing in the release
button, push the parking brake lever all the way down
2-24
and shift the transmission to NEUTRAL. The parking
brake light will stay on if the parking brake is not
fully released.
Notice: Driving with the parking brake on can
overheat the brake system and cause premature
wear or damage to brake system parts. Verify that
the parking brake is fully released and the brake
warning light is off before driving.
Parking Brake (With Air Brakes)
Pulling it out applies the parking brake. The parking
brake light will come on when the air parking brake is
applied.
If your vehicle has air
brakes, you will have
this parking brake.
It is located above the
radio on the instrument
panel.