SERVICE MANUAL UPDATE-SEC 10A1 SLIDING DOOR DIAGNOSIS. Chevrolet Astro

SUBJECT: SERVICE MANUAL UPDATE - SECTION 10A1 - SLIDING DOOR DIAGNOSIS

VEHICLES AFFECTED: 1985-93 "M/L" VANS

THIS BULLETIN IS BEING REVISED TO ADD ADDITIONAL PART NUMBERS.

This bulletin updates Section 10A1 of the 1985-93 M/L Service Manuals.

DIAGNOSIS OF SLIDING DOOR (EFFORT)

PROBLEM

1. Door Hard to Open or Close

POSSIBLE CAUSE

1A. Rear striker too high or low

1B. Centre roller track misadjusted

1C. Locators too high or low

CORRECTION

1A. Look for witness marks on locking cam of rear latch. Adjust rear striker.

1B. Adjust centre roller track so that roller rides in the centre of the track, and doesn't ride too high or low.

1C. Close door while observing feature line. If the feature line goes up or down, adjust the lower locator. If lower indicator locator is non-adjustable, replace with service kit (GM P/N 15692378) and adjust.

PROBLEM

2. Door Won't Release From.Hold Open

POSSIBLE CAUSE

2. Lower roller cable release misadjusted.

CORRECTION

2. Loosen screw on lower roller and to pull on release cable and remove slack, then tighten screw.

PROBLEM

3. Door Hard to Open

POSSIBLE CAUSE

3. Door Sticks to Weatherstrip

CORRECTION

3. Run a finger over weatherstrip, If it drags, replace weatherstrip with new style (GM P/N 15958402).

PROBLEM

4. Door Hard to Close

POSSIBLE CAUSE

4A. Rear Striker too far in.

4B. Door too high at the front in relation to opening.

4C. Door header clearance too small.

CORRECTION

4A. Adjust rear striker

4B. Look for witness marks on the inside pockets of the locator holes. Adjusting the lower roller bracket UP will LOWER the door.

4C. Remove roof rail weatherstrip and close door. If effort improves, reform the header for more clearance.

PROBLEM

5. Door Chatters or Won't Glide Smoothly

POSSIBLE CAUSE

5A. Upper roller out of adjustment

5B. Upper roller bearing failure

5C. Dirt in track

CORRECTION

5A. Reform upper roller bracket to eliminate vertical loading on the roller. Roller must ride on the horizontal (round) surface.

5B. Replace upper roller bracket

5C. Clean and lube channel

DIAGNOSIS OF SLIDING DOOR (SQUEAKS AND RATTLES)

PROBLEM

1. Chucking Over Bumps

POSSIBLE CAUSE

1A. Locators misadjusted

1B. Lower roller misadjusted

CORRECTION

1A. Verify new style upper locator with sanoprene coating. VerifY new style lower locator with studs and access plugs. If not new style, replace with service kit (GM P/N 15692378) and adjust. Adjust lower roller bracket until roller contacts track.

1B. Adjust lower roller

PROBLEM

2. Outside Handle Lock Rod Rattle

POSSIBLE CAUSE

2A. Bell crank sloppy

CORRECTION

2A. Drill out rivet in centre of outside handle lock rod bellcrank and replace it with a bolt, nylon washer, and torque prevailing nut to remove play (slack) in assembly.

PROBLEM

3. Itching noise

POSSIBLE CAUSE

3A. B-pillar garnish rubs on door trim panel

CORRECTION

3A. Apply low friction tape (GM P/N 22586239 or equivalent) to B-pillar garnish and door trim panel.

PROBLEM

4. Inner door panel rattling

POSSIBLE CAUSE

4A. Inner door panel flexing

CORRECTION

4A. Shim inner and outer door panels with foam tape in centre of door.

PROBLEM

5. Rattle noise at rear latch assembly

POSSIBLE CAUSE

5A. Too many/few washers in rear striker

CORRECTION

5A. Look for witness mark on latch case of locking cam. Remove rear quarter trim pane Refer to SECTION 10A4. Remove washers and readjust striker.

PROBLEM

6. Metallic rattle in lower door

POSSIBLE CAUSE

6A. Lower access panel loose

CORRECTION

6A. Tighten lower access panel screws

PROBLEM

7. Itch noise in bottom of door

POSSIBLE CAUSE

7A. Trim panel hits on step well pad

CORRECTION

7A. Remove lip from step well pad with a knife.

PROBLEM

8. Rattle around window

POSSIBLE CAUSE

8A. Rear edge of garnish moulding rattles

CORRECTION

8A. Insulate inside of garnish moulding with foam tape

PROBLEM

9. Swing Out window latch rattles

POSSIBLE CAUSE

9A. Improper coating on pin

CORRECTION

9A. Install Teflon pin (GM P/N 15690675 or equivalent)

PROBLEM

10. Itch noise in window area

POSSIBLE CAUSE

10A. Window contacts trim panel

CORRECTION

10A. Remove door trim panel and rubber edge guard between glass and trim panel to trim gamish 2-3 mm for clearance. Reinstall garnish and road test.

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.