Chevrolet Silverado 2007 Owner's Manual page 643

Ignition Transmission Lock Check
While parked, and with the parking brake set, try
to turn the ignition to LOCK in each shift lever
position.
•
The ignition should turn to LOCK only when
the shift lever is in PARK (P).
•
The ignition key should come out only
in LOCK.
Contact your GM Goodwrench
required.
Parking Brake and Automatic
Transmission Park (P) Mechanism Check
CAUTION:
{
When you are doing this check, your
vehicle could begin to move. You or
others could be injured and property
could be damaged. Make sure there is
®
dealer if service is
CAUTION: (Continued)
CAUTION: (Continued)
room in front of your vehicle in case it
begins to roll. Be ready to apply the
regular brake at once should the vehicle
begin to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular
brake, set the parking brake.
•
To check the parking brake's holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure
from the regular brake pedal. Do this until the
vehicle is held by the parking brake only.
•
To check the PARK (P) mechanism's holding
ability: With the engine running, shift to
PARK (P). Then release the parking brake
followed by the regular brake.
Contact your GM Goodwrench
required.
®
dealer if service is
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