Tailgate Window Defogger - Will Not Function

Number:
91-522-10

Section:
10

Date:
NOV. 1992

Corporate Bulletin No.:
261008

ASE No.:
B1



Subject:
TAILGATE WINDOW DEFOGGER WILL NOT FUNCTION


Model and Year:
1983-91 S/T TRUCKS



Owners of some 1983-91 S/T Blazers may comment that the tailgate window defogger will not function.

This condition may be caused by an electrical failure at the tailgate glass support/lift cylinder connection caused by the improper orientation of the wiring male connector to the tailgate glass lift cylinder. A redesigned glass lift cylinder has been released to eliminate this condition. Previously only one cylinder was released for both sides of the glass. To insure proper orientation of the male connector, separate part numbers are now required for the right and left cylinders.

SERVICE PROCEDURE:

1. Inspect the wiring for breaks at or near the glass lift cylinder connections.

2. Repair the wiring using procedures outlined in section 8A of the 1992 S/T Service Manual.

3. Replace the glass lift cylinder(s) with the redesigned cylinder(s) using correct part number(s) for the right and left cylinders.

4. Close the tailgate glass and verify that the wiring is not trapped between the glass and the weatherstrip. Reposition the wiring if required to prevent water intrusion.


SERVICE PARTS INFORMATION

PART NUMBER DESCRIPTION QTY

15688545 Tailgate Glass Support/Lift Cylinder, Right 1

15688546 Tailgate Glass Support/Lift Cylinder, Left 1


Parts are currently available from GMSPO.


WARRANTY INFORMATION

For vehicles repaired under warranty use:



LABOR OPERATION DESCRIPTION LABOR TIME

N6440 Rear defogger wiring/connector repair *

C0740 Replace tailgate glass support, right *

C0741 Replace tailgate glass support, left *

C0747 Replace tailgate glass support, both *

*Use applicable labor time guide for labor hours.