Coding Side Bar Lock; Key Blanks; Exploded View Of Ignition Lock Assembly; Key Coding Diagram - Pontiac Grand Prix Service Manual

GENERAL INFORMATION A N D LUBRICATION 0-5
6. Pull key and lock assembly out of cylinder.
CODING SIDE BAR LOCK
Two separate keys are used; type "E" (square) for
ignition switch, door locks and tailgate and type "H"
(oval) for the trunk and glove compartment. The keys
will not be interchangeable with each other or with
those used prior to 1969 because of new keyway
design.
Locks are available without tumblers, springs or
retainers. Uncoded side bar locks may be coded to
match the keys used on the car by ordering the above
parts separately. Five types of tumblers are used to
compose the various combinations and each is coded
according to a number, one (1) through five
(S),
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. 0-14, 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,
WAVE WASHER
E K E Y
FOR IGNITION AND DOOR
LOCKS, USE CODE SERIES OJOO
TO 9J99 AND OK00 TO 9KOO
ti K E Y
FOR REAR COMPARTMENT
AND GLOVE COMPARTMENT
LOCKS, USE CODE SERIES 0100
TO 9199 AND OM00 TO 9M99.
Fig. 0-13 Exploded View of Ignition Lock Assembly
L
write that number in the blank space above the
position numbers.
After the key code has been determined, the correct
tumblers 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.
2. Insert spring in each round cavity of each tumbler
lock between slots.
NOTE: Do not pull springs apart; unscrew them.
3. Install spring retainer over springs with ends
inserted in slots, and hold in place.
4. Check by inserting cut key. Side bar will drop in
!
lace when key is inserted if correct tumblers have
een installed.
5. Install spring retainer using vise.
Fig. 0-12 Key Blanks
Fig. 0-14 Key Coding Diagram