New Tumblers

New tumblers are available from GMSPO for recoding lock cylinders that use double-sided reversible keys. These new tumblers should be used immediately and information about the disposition of original tumblers will be provided by GMSPO. Figure 1 shows the new tumbler profile. The shaded area was part of the original tumbler profile, and is removed on the new tumblers. The new part numbers for the tumblers are as follows:

Part No. 2852732 = Tumbler # 1

Part No. 2852733 = Tumbler # 2

Part No. 2852734 = Tumbler # 3

Part No. 2852735 = Tumbler # 4

Follow the procedures in the General Information Section of the appropriate vehicle Service Manual when recoding of cylinders is required.