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Service bulletin 3680

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10016544
Published by NHTSA2005-09-21
Manufacturer's number3680
NHTSA componentEXTERIOR LIGHTING:HEADLIGHTS

NHTSA's summary

AUTOMATIC HEADLAMP DEFEAT INOPERATIVE AFTER BCM REPLACEMENT. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Lighting, Headlights

Vehicles listed
BUICK RAINIER2004, 2005, 2006
CHEVROLET TRAILBLAZER2002, 2003, 2004, 2005
CHEVROLET TRAILBLAZER 3602006 (the catalog's model; the bulletin names a series or trim of it)
GMC ENVOY2002, 2003, 2004, 2005
GMC ENVOY 3602006 (the catalog's model; the bulletin names a series or trim of it)
OLDSMOBILE BRAVADA2002, 2003, 2004

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
15V5190002015-08-14. EXTERIOR LIGHTING:HEADLIGHTS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
02-08-42-001I2017-08-31. Service bulletin. This informational bulletin provides an out line on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage and what should be considered warranty replacement and not
01-08-42-001K2017-08-31. Service bulletin. This informational bulletin provides information on exterior lamp condinsation and replacement guidelines
45202007-12-10. Service bulletin. AUTOMATIC HEADLIGHTS INOPERATIVE UNTIL SHIFTER IS PLACED INTO GEAR. *NJ
44912007-10-29. Service bulletin. HEADLAMP FLICKER OR MOMENTARILY DIM WHILE DRIVING. 06-06-03-004 SUPPLEMENT. SHORT WHEEL BASE ONLY. *NJ UPDATED 1/30/08. *NJ
3170E2006-02-16. Service bulletin. IPC, INTERIOR LIGHTS AND/OR HEADLAMPS FLICKER. *AK FB2
0508420052005-11-03. Service bulletin. INFORMATION ON VERTICAL REFLECTION FROM HEADLAMPS WHEN USING HIGH BEAMS IN DENSE FOG. *TT UPDATED 04-04-07. *KB
0508420012005-05-14. Service bulletin. DIAGNOSTIC INFORMATION ON HEADLAMPS FLICKER OR MOMENTARILY DIM WHILE DRIVING. *TT
3317A2005-04-20. Service bulletin. HEADLAMPS FLICKER OR DIM WHILE DRIVING. *TT
30442004-10-14. Service bulletin. LOCATION OF THE HEADLAMP DRIVER MODULE (HDM). *TT
0308420102003-12-02. Service bulletin. DAYTIME RUNNING LAMP FEATURE CANNOT BE DISABLED AFTER BODY CONTROL MODULE (BCM)REPLACEMENT. *TT