SERVICE MANUAL UPDATE-SEC 10A1 SLIDING DOOR DIAGNOSIS

SUBJECT: SLIDING DOOR DIAGNOSIS

MODEL and YEAR: 1985-93 M/L ASTRO VANS

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

DIAGNOSIS OF SLIDING DOOR (EFFORT)

PROBLEM: Door Hard to Open or Close

POSSIBLE CAUSE - Rear striker too high or low. - Center roller track misadjusted. - Locators too high or low.

CORRECTION - Look for witness marks on locking cam of rear latch. Adjust rear striker. - Adjust center roller track so that roller rides in the center of the track, and doesn't ride too high or low. - 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: Door Won't Release From Hold Open

POSSIBLE CAUSE Lower roller cable release misadjusted.

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

PROBLEM: Door Hard to Open

POSSIBLE CAUSE Door Sticks to Weatherstrip.

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

PROBLEM: Door Hard to Close

POSSIBLE CAUSE - Rear Striker too far in. - Door too high at the front in relation to opening. - Door header clearance too small.

CORRECTION - Adjust rear striker. - Look for witness marks on the inside pockets of the locator holes. - Adjusting the lower roller bracket UP will LOWER the door. - Remove roof rail weatherstrip and close door. If effort improves, reform the header for more clearance.

PROBLEM: Door Chatters or Won't Glide Smoothly

POSSIBLE CAUSE - Upper roller out of adjustment. - Upper roller bearing failure. - Dirt in track.

CORRECTION - Reform upper roller bracket to eliminate vertical loading on the roller. Roller must ride on the horizontal (round) surface. - Replace upper roller bracket. - Clean and lube channel.

DIAGNOSIS OF SLIDING DOOR (SQUEAKS AND RATTLES)

PROBLEM: Chuckling Over Bumps

POSSIBLE CAUSE - Locators misadjusted. - Lower roller misadjusted.

CORRECTION - 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. - Adjust lower roller.

PROBLEM: Outside Handle Lock Rod Rattle

POSSIBLE CAUSE Bell crank sloppy.

CORRECTION Drill out rivet in center 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: Itching Noise

POSSIBLE CAUSE B-pillar garnish rubs on door trim panel.

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

PROBLEM: Inner Door Panel Rattling

POSSIBLE CAUSE Inner door panel flexing.

CORRECTION Shim inner and outer door panels with foam tape in center of door.

PROBLEM: Rattle Noise At Rear Latch Assembly

POSSIBLE CAUSE Too many/few washers in rear striker.

CORRECTION Look for witness mark on latch case of locking cam. Remove rear quarter trim panel. Refer to Section 10A4. Remove washers or add and readjust striker.

PROBLEM: Metallic Rattle In Lower Door

POSSIBLE CAUSE Lower access panel loose.

CORRECTION Tighten lower access panel screws.

PROBLEM: Itch Noise In Bottom Of Door

POSSIBLE CAUSE Trim panel hits on step well pad.

CORRECTION Remove lip from step well pad.

PROBLEM: Rattle Around Window

POSSIBLE CAUSE Rear edge of garnish molding rattles.

CORRECTION Insulate inside of garnish molding with foam tape.

PROBLEM: Swing Out Window Latch Rattles

POSSIBLE CAUSE Improper coating on pin.

CORRECTION Install teflon pin (GM P/N 15690675 or equivalent).

PROBLEM: Itch Noise In Window Area

POSSIBLE CAUSE Window contacts trim panel.

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

Parts are currently available from GMSPO.

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.