Pontiac FIREBIRD 1972 Service Manual page 8

0-6 1972 PONTIAC SERVICE MANUAL
Fig. 0 - 1 3 Removing Lock From Cylinder
trunk and glove compartment. The keys will not be inter-
changeable with each other or with prior keys because of
new keyway design.
Lock kits are available without tumblers, springs or re-
tainers. Uncoded side bar locks may be coded to match the
keys used on the car by ordering the above parts sepa-
rately. Five types of tumblers are used to make the various
C KEY
FOR IGNITION AND DOOR
LOCKS, USE CODE SERIES OONO
TO 99N9 AND OOPO TO 9 9 W
D KEY
FOR REAR COMPARTMENT
AND GLOVE COMPARTMENT
LOCKS, USE CODE SERIES OOSO
TO 99S9 AND OOUO TO 99119
@q
MARK (If EXCELLEKE
I
POSITION LEVELS
Fig. 0-1 5 Key Coding Diagram
combinations and each is coded according to a number,
one (1) through five ( 9 , stamped on its side. Before the
lock cylinder may be coded, the correct code must be
determined. If the numbered blank in the key head has not
been removed, determine the code by consulting the lock
manufacturer's code book. Should the blank be missing,
proceed as follows:
1. Place the key on the silhouette in Fig. 0- 15, aligning
the key with the outline as accurately as possible.
2. Starting at the base of the key blade, determine the
lowest level visible in position No. 1.
3. Determine the lowest visible level for the remaining
five positions. As each tumbler level is determined,
write that number in the blank space above the posi-
tion numbers.
After the key code has been determined, the correct tum-
blers should be installed as follows:
1. Beginning with slot next to head of cylinder (number
one position) install tumblers in slots in sequence
determined from key code.
PRE-CUT TUMBLERS
Fig. 0-14 Key Blanks
Fig. 0-1
6
Pre-Cut Tumblers