OUTSIDE DOOR HANDLE RATTLES & LOCK FREEZES-NEW DESIGN ASSY.

Subject: OUTSIDE DOOR HANDLE RATTLES AND/OR LOCK CYLINDER FREEZES

Model and Year: 1988-91 C/K TRUCKS

Some 1988-1991 C/K Trucks outside door handles may rattle when the door is closed. The rattle is from an interference between the door handle spring and the handle inner panel. Also, some 1988-1991 C/K Trucks may experience door lock cylinder freeze up in cold, moist conditions. Water from rain or car washes enters the lock cylinder through a hole in the outside door handle housing where the cylinder retaining panel snaps into the housing. This water can freeze in cold weather, thus rendering the lock cylinder inoperative.

To correct these conditions, it is necessary to replace the outside door handle assembly with a redesigned handle assembly (P/N 15686155 LH or 15686156 RH). To stop the door handle spring from moving a rib was added to the bezel (Figure 1) and a piece of foam tape was placed over the hole to prevent water from entering the lock cylinder (Figure 1).

SERVICE PROCEDURE:

1. Remove door trim panel. 2. Remove door module and window. 3. Remove outside handle rod from rod clip. 4. Remove lock cylinder rod from lock cylinder clip. 5. Remove outside handle mounting screws. 6. Remove door lock cylinder from the outside handle housing. 7. Remove door handle assembly. 8. Install revised door handle assembly (P/N 15686155 LH or 15686156 RH). 9. Install door lock cylinder to the outside handle housing. 10. Install lock cylinder rod to the lock cylinder clip. 11. Install handle rod to the handle assembly clip. 12. Install outside handle mounting screws. 13. Install door module and glass. 14. Install door trim panel.

SERVICE PARTS INFORMATION

Part Number Description Quantity ---------- ---------------- -------- 15686155 Handle Assembly-Frt Outside Door LH 1

15686156 Handle Assembly-Frt Outside Door RH 1

Parts are expected to be available on October 21, 1991. In case of limited inventory, parts will be placed on 400 control to waive VIP surcharges. Only verifiable emergency orders will be accepted. SPO will make every effort to obtain parts. However, the part will be shipped premium transportation at the dealer's expense and all other order types will be placed on backorder until the 400 control is removed.

WARRANTY INFORMATION

For vehicles repaired under warranty use:

Labor Operation Description --------------- ------------- B4120 Right Handle, Front Door Outside-Replace B4121 Left Handle, Front Door Outside-Replace

Use applicable labor time guide for labor hours.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.