SLIDING DOOR BRKT. PROBLEMS P/N'S FOR NEW BRKT. ASSEMBLY

VEHICLES AFFECTED: 1985-86 'M' Van

A new centre track and roller bracket assembly has been released for 1985-86 'M' Vans to improve the sliding side door system durability. Effective with GMC VIN 1G5DM15Z9GB508302 and CHEV VIN 1GCDM15Z9GB135091 on November 22, 1985, all 'M' Vans are built with the new track and roller brackets.

If the sliding door exhibits damage to the centre track or roller bracket assembly, both parts must be replaced with the new part number parts.

Perform the following service procedure when installing the new parts (listed below) on vehicles requiring side door repair.

Service Procedure

1. Basecoat/clearcoat the new centre track and roller bracket assembly to match the vehicle exterior finish.

2. Remove interior trim panels (passenger model only) from right rear quarter panel to expose centre track assembly and track cover fasteners (See Figure No. 1).

3. Remove the right rear tail lamp assembly and rubber plug to expose rearmost nut securing centre track cover.

4. Remove the two bottom door lock assembly screws from the sliding door. Loosen the top screw and pivot the latch outboard.

5. Remove the pin from the roller bracket assembly (See Figure No. 3). Support the bottom of the door so that it does not drop after the pin is removed.

6. Remove the centre track cover (See Figure No. 2).

7. Remove the old roller bracket assembly and discard.

8. Remove the fasteners which secure the centre track assembly (See Figure No. 1). Care should be used when removing this piece so that the vehicle is not scratched.

9. Loosely install the new centre track (P/N 15554723) using the existing fasteners. Reinstall track plug. Install new roller bracket in track. Reinstall pin in door and roller bracket. Reinstall screws in door lock (See Figures No. 1 and No. 3). Align the door for even gaps in the fore/aft direction when closed, then slide the track assembly rearward until rollers touch centre track flange. Torque centre track hardware 10-14 N.m (7-10 ft. lbs.).

10. Reinstall centre track cover. Torque the three screws 3-4 N.m (2-3 ft. lbs.) and the nut 10-14 N.m (7-10 ft. lbs.) (See Figure No. 2).

11. Test door for smooth opening and closing operation and inspect the door fit in the closed position.

12. Reinstall the plug and tail lamp assembly.

13. Reinstall interior trim panels if previously removed.

Parts Information

Part Number Description Quantity ----------- ----------- -------- 15554723 Centre Track 1 15554799 Roller Bracket 1

Time to make this modification is .6 hours plus .5 hours to basecoat/clearcoat.

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.