Key And Lock Cylinder Coding - GMC chevrolet camaro 2000 Service Manual

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General Information
Key and lock Cylinder Coding
Key Identification and Usage
The lock cylinder keyway is designed so that other
model keys will not enter a current model lock cylinder.
A single key is used for all locks on the vehicle.
The key identification is obtained from the
four-character key code stamped on the knockout
portion of the key head. Knock the plugs out of the key
head after the code numbers have been recorded.
The code list, available to owners of key cutting
equipment from equipment suppliers, determines the
lock combinations from the code numbers.
If the code numbers are not available from the records
or from the knockout plug, lay the key on the key code
diagram in order to determine the lock combinations
(the tumbler numbers and the position arrangement).
Cutting Keys
2
65495
After the code has been .determined from the code list
or the key code diagram, perform the following steps:
1. Cut a blank key to the proper level (1) of each
of the tumbler positions (2).
2. Inspect the key operation in the lock cylinder.
General Information 0-27
Replacement Lock Cylinders
New lock cylinders (except ignition lock cylinders) are
available from the service parts warehouse with new
lock cylinder locking bars. The tumblers are also
available and must be assembled into the cylinder as
recommended. For additional information, refer to the
following.
Lock Cylinder Tumbler Operation
All lock tumblers are shaped alike with the exception of
the notched position on one side. As the key is inserted
into the lock cylinder, the tumblers are lowered to the
correct height so that the notches on each tumbler are
at the same level. When the notches on all six tumblers
line up, two small springs push the side bar into the
notches, allowing the cylinder to turn in the cylinder
bore. Five types of tumblers are used in making the lock
combinations, and each tumbler is coded and stamped
with a number between 1 and 5.
Assembling and Coding ignition Lock
Cylinders
Tools Required
J 41340 Lock Cylinder Staking and Holding Fixture
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1. Determine the tumbler numbers/arrangement: .
1.1. Place the tip of the key directly over the
tip of the illustrated key.
65496
1.2. Inspect that the diagram outlines the key.
1.3. Starting with position
1
(open end of
cylinder), find and record the lowest
level (tumbler number) that is visible.
1.4. Repeat the previous step for positions 2-:-10.