Chevrolet 2007 Silverado, Owner'S Manual, Page: 643 / 688

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
®
dealer if service is
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
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
®
dealer if service is
required.
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