Syclone V6-262 4.3L Turbo (1991)
Rear Defogger Switch: Customer Interest
Defogger/Rear Wiper Switch - Become Hot
GMC NUMBER:
91-8A-127
GROUP:
8A Cab Electrical
DATE:
July, 1991
CORPORATE
NUMBER:
168101
SUBJECT:
REAR WINDOW DEFOGGER SWITCH AND REAR WINDOW WIPER SWITCH BECOME HOT TO TOUCH
MODELS:
1991 S/T UTILITY VEHICLES
Some owners of 1991 S/T utility models may comment on a condition where the rear window defogger switch and/or the rear window wiper switch is hot
to the touch after the dash lights have been on for a period of time. This condition was corrected in production through the introduction of new switch
assemblies which have bulbs that operate at lower temperatures. Vehicles built after the VIN breakpoints listed below have been built with the latest
design switches.
Plant
GMC
Chevrolet
Oldsmobile
Pontiac West
M0529589
M0198875
-
Moraine
M2548564
M2272059
M2704676
Shreveport
M8540761
M8257710
-
If this condition occurs, a new rear window defogger switch and/or rear window wiper switch should be installed to replace the affected part.
SERVICE PROCEDURE:
1. Disconnect negative battery cable.
2. Remove trim plate retaining screw.
3. Remove trim plate.
4. Disconnect wiper/defogger switch connector(s).
5. Remove switch(s) from trim plate.
6. Install new switch(s).
7. Reconnect wiring connector(s).
8. Reinstall trim plate in dash.
9. Reinstall retaining screw.
10. Reconnect negative battery cable.
SERVICE PARTS INFORMATION
Part
Number
Description
Quantity
15679578
Rear window defogger
1
switch
15679579
Rear window wiper switch
1
Parts are currently available from GMSPO.
WARRANTY INFORMATION
For vehicles repaired under warranty use:
Labor
Labor
