FRONT DOOR GLASS CHANNEL DISENGAGEMENT & BINDING. Buick Electra/Park Avenue 1985

For 1990-2009 cars

# FRONT DOOR GLASS CHANNEL DISENGAGEMENT & BINDING

#### MODELS AFFECTED: 1986 LESABRE 1985-86 ELECTRA

A condition may exist on some 1986 LeSabres, and 1985-86 Electras in which the front door glass becomes repetitively disengaged from the run channels. Several factors that may contribute to this condition include:

o Improper adjustment of door glass during reinstallation, o Rear run channel guide not properly secured. o Wrong guide clip(s) installed. o Mirror "patch" insulator binding in front run channel. o Regulator lacks up stop and overtravel occurs.

Usage of the following information will help ensure that the repair is done right the first time.

#### IMPROPER ADJUSTMENT OF FRONT DOOR GLASS

Follow recently published procedure outlined in Service Bulletin 86-10-9A, dated, July, 1986.

#### WRONG GUIDE CLIPS

Two door glass thicknesses were used. Door glass on some very early 1985 Electras were 5m thick. It then went to 4mm and reverted back to 5mm in May, 1985. Different glass thickness required different clips. Breakpoints for the latest change in 1985 to 5mm thick glass are.

Orion Plant F4386037 - Oldsmobile Wentzville Plant F1350147 - Oldsmobile F1499216 - Buick

In 1986, front door glass thickness is 5mm.

If unsure of the glass thickness, use a micrometer and measure. 5mm = .20" 4mm = .16"

Guide clips are color coded; black for 4mm and gray for 5mm. Correct parts information is: 5mm 4MM Front 20487631 20487630 Rear 20478732 20478733

Parts are available through GMWDD.

#### REAR GUIDE CLIP NOT SECURED

A worn clip mold condition existed on early 1986 models and may cause clip hinge binding and prevent securing of the rear clip through the glass. This condition was corrected in December. Dealer stock ordered prior to January should not be used. GMWDD current stock is good.

It is best to replace both front and rear guide clips if either one has disengaged from run channel. Make sure that new clips are properly secured through glass. Inspect and replace run channel retainer if any distortion or damage is evident. Follow removal and installation procedure in Section 5C of 1986 Body Service Manual. The run channels should not be lubricated to correct guide clip disengagement condition. Guide clips may be lubricated with a soap or silicone base lube.

#### MIRROR "PATCH" INSULATOR REWORK

The mirror "patch" filler or insulator may cause a slight twist or bend in the front upper run channel due to the gasket interfering with the run channel upper retainer bracket. This interference causes a bind and does not allow the retainer to move freely when adjusting the glass. Correction of this condition will also reduce window operating efforts. The rework should be done before adjusting the door glass and consists of the following steps:

1. Remove mirror cover plate.

2. Remove a 20mm (.80") wide section by 13mm (.52") deep section at the rear edge of the insulator centered between the two rear stud holes in the mirror cover plate. Refer to Illustration. This will allow free movement of the front run channel to upper attachment screw.

In plant start of change breakpoints are:

Buick City GH462000 - Buick LeSabre Orion SOP 1987 - Olds 98 Wentzville G1502860 - Buick Electra G1334768 - Olds 98 G1835762 - Olds 88 Willow Run GW405640 - Olds 88

#### Requlator Lacks Up Stop

Late production regulators have an up stop to prevent tape drive overtravel. Service stock is being updated and a future bulletin will indicate new part numbers for correction of this condition.

WARRANTY INFORMATION FOR MIRROR "PATCH" FILLER REWORK

LABOR OPERATION NUMBER: T5121 LABOR HOURS: .3 HR. (DOES NOT INCLUDE DOOR TRIM R&R) TROUBLE CODE: 92

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.