S10/T10 Blazer 2WD L4-137 2.2L DSL (1984)
Rear Defogger: Customer Interest
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
*
