Curiosii for ever!: Car repair manuals for everyone.

Hardware Attachment Threadlocking

All door hardware production attaching screws contain an epoxy thread-locking compound in order to maintain the minimum original torque setting. Service attaching screws may not contain a thread-locking compound. Apply GM P/N 12345493 (or equivalent) to the hardware attachment as a liquid in order to treat the threads of fasteners for the following reasons:
^ In order to prevent loosening of service screws
^ In order to renew the thread-locking characteristics of production screws

After you install and tighten the screws, the adhesive cures. The curing process is necessary for the following reasons:
^ In order to bond the attachment to the screw
^ In order to prevent loosening of the screw
^ In order to prevent backing out of the screw The adhesive bond does not prevent future attachment removal if required. You may use LOCTITE TM 272 (or equivalent) on any thread fastener.