Ignition Key and Lock Cylinders - Revised
Bulletin: 93-0-5Date: March '93
Ref.No.: 93-115-0
Corp.Ref.No.: 333201R
SUBJECT:
INFORMATION ON IGNITION KEY AND LOCK CYLINDER CHANGES
MODELS AFFECTED:
1993 SKYLARK
General Motors has made styling and design improvements to the ignition keys and lock cylinders. This change removes the center groove on each side of the key and shortens the outer groove by 8 mm. (See Figure 1). The old key blank (P/N 26018738) is interchangeable on both old and new lock cylinders. The new key blank is functional only in a new lock cylinder since internal lock modifications were made to accept the removal of the center key grooves. These changes were made in November of 1992 (1993 model year).
Dealers should continue to use the old key blank (P/N 26018738) on BOTH old and new lock cylinders to maintain interchangeability and to avoid changes in key cutter equipment.
LOCK CYLINDER PARTS INFORMATION:
When servicing of the lock cylinder is required, the following part numbers have been changed:
Parts Description Old Part New Part
1. Lock cylinder for automatic 26037081 26039996
transaxle vehicles
(Includes 2 shear bolts)
KEY CUTTER PARTS INFORMATION:
There is no need to change key cutter equipment since the key blank is not changing. If there is difficulty cutting ignition keys, please contact your local key cutter representative. Two suppliers are listed below, however, other suppliers may be contacted on an individual basis.
ILCON UNICAN
400 Jefferies Rd.
Rocky Mount, NC 27801
Customer Service: 1-800-334-1381
Part Name ILCO P/N
1. Exacta with case 74-Mk1-P26
2. Skylark car accessory 74-MK1-GM-AE-91
Curtis Industries, Inc.
34999 Curtis Blvd.
Eastlake, OH 44095
Ph. (216) 951-2400
Part Name Description Curtis P/N
1. No. 15 Code Cutter 15W-45 19815
OR
No. 15 Code Cutter 15W-38 20518
2. Cam Set GM-4 20514
3. Carriage GM-4A* 20515
4. Decoder Scale GM-4 20141
NOTE:
Carriage GM-4A was revised to GM-4A* in June, 1992 by Curtis Industries.
Aftermarket suppliers may create a new key blank. Using this key blank can create interchangeability problems between old and new lock cylinders.
We believe this source and their equipment to be reliable. There may be additional manufacturers of such equipment. General Motors does not endorse, indicate any preference for or assume any responsibility for the products or equipment from this firm or for any such item which may be available from other sources.
Parts are currently available from GMSPO.