IS-18115

Instruction Sheet
IS-18115
GM Glove box Lock Installation on H-Series vehicles
First Release :
03-29-2019
MATERIAL
Order Kit # IS18115 which includes the following parts:
Part No.
Description
Qty
504156
Lock, Glove box Compartment
1
3210672
Back Plate
1
3210668
Catch
1
IS-18115
Instruction Sheet (EN)
1
FI-18115
Instruction Sheet (FR)
1
Other parts that may be required:
Part No.
N/A
Description
Qty
Length of 1in X 1/2in flat bar
1
3210684
Door, Gray
1
3210690
Door, Tan
1
NOTE
Material can be obtained through regular channels.
PROCEDURE
DANGER
Park vehicle safely, apply parking brake, stop engine. Prior to working on the vehicle, set the ignition
switch to the OFF position and trip the main circuit breakers equipped with a trip button.
Writer: mg

IS-18115
Page 2 / 7
1. Remove the barrel from the lock body. The lock is shipped semi-assembled with the octagonal lock
ring not installed. Pull the barrel out to disassemble it from the lock (key must be in).
NOTE
If for some reason, the barrel was inserted in the body with the lock ring installed, proceed as follows to
remove the barrel:
-
Turn the barrel knob so the first barrel locking tab is exposed through the body window as seen on
the first picture.
-
Using a small paper clip or other suitable tool, press on the locking tab and maintain pressure (key
must be out).
-
With pressure still applied to the locking tab, insert the key. The key will hold all locking tabs in the
retracted (low) position.
-
Pull the barrel out of the lock body.
2. Remove the door from the vehicle.
-
Writer: mg
Inside the glove box compartment, remove the four Phillips head screws holding the door to
the hinges.

IS-18115
Page 3 / 7
3. Remove the lock from the door.
-
With a pair of lock pliers, remove (pry out) the twist knob from the lock barrel and discard the
lock.
4. Enlarge the door interior opening for the new lock.
-
Using the new lock body as a template, scribe the interior opening of the door with a fine
marker. This will provide a visual guide to enlarge the opening.
-
Using a rotary grinder and a suitable die, enlarge the opening following the scribed guide
marks.
Writer: mg

IS-18115
Page 4 / 7
5. Modify the door exterior opening for the new lock.
-
With a small file, grind a notch on the exterior door opening at the 9 O’clock position. Start
with a small 5mm long X 1mm deep notch (0.200 x 0.040 in), adjust as required.
6. Install the new lock on the door.
-
Position the lock body in the opening and secure the backing plate to the door.
-
Using a length of 1in X 0.5in (25 x 12mm) flat bar, fabricate a tool to secure the lock body to
the door with the octagonal lock ring (insert flat bar in octagon to screw in the ring). Make
sure that the small tab in the lock body is inserted in the exterior opening notch.
Writer: mg

IS-18115
Page 5 / 7
7. Replace the lock catch in the vehicle glove box.
-
Remove and discard the door lock catch from the vehicle glove box compartment (do not discard screws).
-
Position the new catch on the door frame so the latch inverted “U” part installed toward the
interior of the compartment.
-
Mark the middle of the screw slots and drill new mounting holes in the door frame.
-
Secure (hand tight firmly) the catch to the door frame.
Writer: mg

IS-18115
Page 6 / 7
8. Reinstall the door.
-
Secure the door to the hinges using the previously removed screws (hand tight firmly).
9. Adjust the door and lock to fit the new catch.
-
Open and close the door several times and check for a good door to frame fit (door gap and
tight locking mechanism). Adjust catch depth and door to hinge position as required.
-
Once proper adjustment is achieved, tighten firmly all catch and door screws.
10. Insert lock barrel in the lock body.
-
Press the barrel first locking tab (closer to knob).
-
Maintain pressure and insert the key
-
Release pressure on the first locking tab (all locking tabs should now be in the detracted (low)
position with key in).
Writer: mg

IS-18115
Page 7 / 7
-
Insert the barrel with the locking tab at a 45deg angle (+/- 10 O’clock position).
-
Make sure the barrel is fully inserted, maintain in place with your fingers and remove the key.
-
Slightly rotate the knob and make sure the barrel is secured in the body.
NOTE
Discard old keys and provide new keys to the vehicle driver/operator
PARTS / WASTE DISPOSAL
Discard waste according to applicable environmental regulations (Municipal/State[Prov.]/ Federal)
Writer: mg