Express 1/2 Ton Van V8-305 5.0L VIN M SFI (1998)
2.
Measure the track dimension between the inner and outer flange at the end of the roller track, past the bend. If the dimension is more than 21 mm
(13/64 in.), replace the track with the new assembly (Figure 2).
3.
Visually inspect the 2 vertical tabs, with the rollers, on the roller bracket. The tabs must be at 90°. If the tabs are not at 90°, or if the tabs are
otherwise damaged, replace the roller bracket.
4.
Visually inspect the 2 welded-on studs that hold the roller bracket to the door. If the studs are broken or cracked, replace the door.
5.
Verify that the door is not sagging at the rear. If the door is sagging, do the following steps:
a.
Loosen the door stud nuts.
b.
Apply LOCTITE(TM) 242, GM P/N 12345382, or equivalent, to the studs.
c.
Lift and align the door.
d.
Tighten the nuts to 11 N.m (97 lb in.). Do not over-tighten the nuts because the studs may break.
6.
Verify that there are witness marks at the latch and striker wedge. If these marks are coming in contact when the door is closed, but the rear of the
door does not latch, add a shim behind the striker. Do not use more than 3 shims. Also, shims can be removed if necessary.
Service Procedure
The sliding door is only adjustable at 3 points; the 2 front roller brackets and the one rear, center-mounted roller bracket. You may need to use the
following Service Procedure more than once in order to achieve the proper alignment.
1.
Begin at the front, top corner of the sliding door. Align the door flush and in-line with the top, rear corner of the front door.
2.
Loosen the front upper and lower brackets. Adjust the sliding door so that the lines are horizontal with the front door.
3.
Inspect the vertical lines at the front and rear of the door. The lines should be even and common. If there is obvious "A" or "V" gapping, loosen
the rear roller bracket and adjust the rear of the door in order to make the vertical lines even. Apply LOCTITE(TM) 242, GM P/N 12345382, or
equivalent, and tighten the roller bracket nuts to 11 N.m (97 lb in.).
4.
Verify that the sliding door is flush with the B and C pillars. In order to correct any incorrect alignment at the B pillar, loosen the front top and
bottom roller hardware on the roller side. Then, move the door in and out as necessary in order to align with the B pillar. Tighten the retaining
bolts to 25 N.m (18 lb. ft).
Important:
If the door rear latch does not catch, or bounces against the rear striker at the
^
pillar when closing the sliding door, you must adjust the door to the rear of the truck at the center track.
5.
If the back of the door is not aligned with the
