Service Procedure

Important:
This service procedure is to be used on delivered vehicles export vehicles, certain vehicles located in remote areas, and inventory vehicles identified in the "Dealer Repaired Vehicle" report. If a vehicle has been delivered to a customer and the VIN is not on the report, contact your AVM (US) District Service/District Fixed Operations Manager (Canada) for approval prior to repairs.

This service procedure should also be used on any vehicle identified during the GM inspection as needing the replacement of a specific piece glass any glass that needs to be replaced will be clearly indicated on the Inspection/Repair Worksheet inside the vehicle. The inspectors will also mark each "bad" piece of glass with a large "X" using a yellow grease marker.

Important:
GM Branded glass must be used for this repair. If this repair will be sublet, inform the installer that GM branded glass MUST be used for this repair and provide them with a copy of the service procedure found in this bulletin. There are unique instructions required when replacing the glass in these vehicles.

Tools and Supplies Required

^ J 24402 A Glass Sealant Cold Knife Remover

^ J 39032 Stationary Glass Removal Tool

^ Isopropyl Alcohol or Equivalent

^ Cartridge-Type Caulking Gun

^ Commercial-Type Utility Knife

^ Razor Blade Scraper

^ Suction Cups

^ Plastic Paddle

Important:
Carefully review the supplemental glass removal instructions below. Refer to SI for a complete list of tools, supplies, and vehicle trim removal and installation procedures. The urethane and primer instructions in this supplement replace the instructions published in SI for front windshield, liftgate window, and quarter windows.

Removing the Glass

1. Cut the glass out by holding the cut-out tool to the edge of the glass with common glass removal technique.

2. Prepare the window opening by cutting the excess urethane from the body.

2.1. During the cut-out process, pull and peel the urethane intermittently in a manner that will separate the urethane from the flange.

2.2. Examine and check for securely bonded urethane, removing any loose urethane.

2.3. If the urethane is securely bonded, skim-cut the urethane leaving 0.5 mm (0.020 in) to 2 mm (0.080 in) on the flange.

2.4. Cut the urethane to remove any ridges, notches, or divots.

2.5. Clean all loose pieces of urethane from the opening.

3. Repair the body bonding surface.

3.1. Locate any areas where the primer/urethane did not adhere to the paint surface.

3.2. If residual primer exists adjacent to the bonding area, remove it by sanding/de-gloss of topcoat with 200 grit GM automotive grade sandpaper.

3.3. Clean the bonding surface using a low-lint paint shop quality rag dampened with the glass bonding adhesive manufacturer's recommended cleaning solvent and allow to flash-dry.

Notice:
DO NOT apply the black body primer on the existing, urethane bead

3.4. Apply black body primer to the topcoat areas where the previous primer/urethane did not adhere, and as needed adjacent to the skim-cut bead. Apply to any exposed metal non-class A surface (viewable paint surface after re-trim).

3.5. Allow the black body primer to dry per the primer manufacturer's requirements prior to installing the glass.

Glass Preparation

1. The glass must be clean, dry, and free of contaminates prior to the primer application.

Wipe the glass with a clean, low-lint, paint shop quality rag dampened with the glass bonding adhesive manufacturer's recommended cleaning solvent and allow to flash-dry.

2. Allow the solvent to fully flash off prior to the application of the glass primer(s).

NOTICE:
The black glass primer application must be Continuous and streak-free in the bonding area.

3. Apply the glass primer(s) to the glass blackout (frit) per the adhesive/primer manufacturer's requirements using the original/provided dimensions and locations.

Re-apply the black glass primer if a second coat is necessary. If clear primer is used, do not re-apply the primer on the black. Use black glass primer on black primer only.

Urethane Application to the Glass

1. Apply a continuous bead of urethane adhesive over the previously applied glass primers using the original/provided dimensions and locations. The bead should be a minimum of 14 mm (0.6 in) high and 8 mm (0.3 in) wide at the base, in the shape of a blunt triangle.

NOTICE:
Use of an alternative method of urethane application "bead applied to body", may be used as required/needed.

Notice:
At no time should the applied urethane exceed 5 minutes prior to glass installation.

2. Install the glass to the vehicle within 5 minutes of the urethane application.

3. If the 5 minute limit is exceeded, scrape/remove the urethane and reapply a new bead.

4. Upon installation, check the left / right positioning (centering) and lightly press the glass into position.

5. Position the glass to ensure that the rear edge of the upper reveal molding does not gap to the roof surface, by shifting the windshield upward.

6. Apply masking tape to hold the glass in place during the urethane cure. Use a tape that will not leave adhesive residue on the vehicle upon removal.

7. Clean any excess urethane adhesive on the show surfaces by wiping immediately with a paint shop quality rag dampened with the glass bonding adhesive manufacturer's recommended cleaning solvent.

8. Remove the masking tape after two hours.

Service Procedure

1. Remove the windshield, liftgate window, and quarter windows from the vehicle. Refer to Windshield Replacement, Quarter Window Replacement, and Liftgate Window Replacement in SI for window removal instructions.

2. Replace the windshield, liftgate window, and quarter windows. Refer to Windshield Replacement, Quarter Window Replacement, and Liftgate Window Replacement in SI for window installation instructions.