Lighting - Auto Lamps Operate Erratically/Inoperative

Bulletin No.: 03-08-42-012

Date: November 18, 2003

TECHNICAL

Subject:
Twilight Sentinel/Automatic Headlamp Control Not Functioning Correctly or is Inoperative (Reprogram BCM)

Models:
2000-2004 Chevrolet Corvette
with Automatic Headlamp Control (RPO T82)

Condition

Some customers may comment that the twilight sentinel/automatic headlamp control delays turning on/turning off or is inoperative.

Correction

A procedure using the Tech 2(R) has been developed to reprogram the twilight sentinel feature within the BCM.

Important:
The Tech 2(R) must contain software version 23.006 or later available from Techline(R) starting October 18, 2003, on the TIS 2000 version TIS 11/2003 data update or later.

1. Install the Tech 2(R) to the vehicle and power on.

2. Build the vehicle from the menu options.

3. Select "Special Functions" from the menu options.

4. Select "Twilight Sentinel Reprogram" from the menu options.

When the reprogramming is completed, the twilight sentinel feature should function properly if no other faults are present in the system.

Warranty Information





For vehicles repaired under warranty, use the table.





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