Hydraulic Brakes; Propshaft Brake Burnish Procedure; Parking Brake - GMC 2003 GMT560 T-Series Owner's Manual

Hydraulic Brakes

If your vehicle has hydraulic brakes, it has a parking
brake lever. The lever is located in the center console.
Your vehicle may also be equipped with an automatic
transmission which has a center console shift lever. This
lever will have a PARK (P) position on the shift
indicator. Even when PARK (P) is selected, be sure
to apply the parking brake firmly so the vehicle
won't move.

Propshaft Brake Burnish Procedure

It is recommended that the propshaft-mounted parking
brake be burnished as part of the new vehicle
break-in. The parking brake will work best after it has
been burnished following these instructions:
Make 10 stops, using the parking brake hand lever,
from 20 mph (32 km/h) about 2 1/2 miles (4 km) apart.
Between stops, drive the vehicle at 20 mph (32 km/h).

Parking Brake

To apply the parking brake, pull the lever all the way up.
The park brake light will come on when the parking
brake is applied. Then shift the transmission to
NEUTRAL (N) or PARK (P). The vehicle must be
stationary when applying the parking brake, except while
burnishing the parking brake linings. See "Propshaft
Brake Burnish Procedure" earlier in this section.
2-20
If your parking brake doesn't hold the vehicle when
applied, see your dealer to adjust your parking brake
properly.
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
and shift the transmission to NEUTRAL (N). The
park brake light will stay on if the parking brake is not
fully released.
Notice: Driving with the parking brake on can
overheat the parts in the system. You may have to
replace them, and you could also damage other
parts of your vehicle.