Backup Lamps/Tailgate Window Release - Inoperative

9208chevy01

GMC NUMBER: 91-8A-170

GROUP: 8A Cab Electrical

DATE: December, 1991

CORPORATE
NUMBER: 168104


SUBJECT: BACKUP LAMPS OR TAILGATE WINDOW RELEASE INOPERATIVE (INSTALL REVISED SWITCH)

MODELS: 1980 - 1991 LIGHT DUTY TRUCKS WITH AUTOMATIC TRANSMISSIONS


Owners of some 1980-1991 C/K, 1982-1991 G, 1985-1991 M/L, 1984-1991 P2 and P3, 1987-1991 R/V, and 1983-1991 S/T (including LLV) with automatic transmissions may comment on a condition of inoperative back-up lamps or inoperative tailgate window release. This condition occurs when the vehicle's gear shift lever is placed in the "reverse" position but the back-up lamps do not illuminate. In addition, on the S/T utility vehicles, the electric tailgate window release does not release when the transmission gear shift lever is placed in the "park" or "neutral" position and the endgate window release button is depressed. The park/neutral and back-up lamp switch comes out of adjustment, which does not allow for the contact points to remain engaged.

To correct these conditions, the contact carrier on the park/neutral and back-up lamp switch has been modified to increase switch carrier travel.

SERVICE PROCEDURE:

1. Disconnect the negative battery cable from the battery.
2. Disconnect the switch assembly harness.
3. Place the gear selector in neutral.
4. Squeeze the tangs on the switch together and remove the switch assembly.
5. Install the new switch assembly (P/N 15679680) by:

- aligning the actuator with the cutout in the
steering column jacket.
- inserting the tangs into the rectangular
holes and pushing down on the switch
assembly.



6. Adjust the switch by moving the gear selector to park.
7. Connect the switch assembly harness.
8. Connect the negative battery cable.
9. Check for proper switch operation. Readjust the switch as necessary.

SERVICE PARTS INFORMATION:

Part
Number Description
15679680 Park/Neutral and Back-up Lamp Switch

Parts are currently available from GMSPO.

WARRANTY INFORMATION:
For vehicles repaired under warranty use:

Labor Labor
Model 0p. Description Time
S/T N2050 Switch, Park/Neutral-Replace 0.4 hrs.
C/K N2050 Switch, Park/Neutral-Replace 0.3 hrs.
M/L N2050 Switch, Park/Neutral-Replace 0.3 hrs.
P N2050 Switch, Park/Neutral-Replace 0.2 hrs.
G N2050 Switch, Park/Neutral-Replace 0.2 hrs.
LLV N2050 Switch, Park/Neutral-Replace 0.4 hrs.