WenmarOpen by Wenmar Pro

Service bulletin PIT-4835

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 id10030209
Published by NHTSA2009-08-19
Manufacturer's numberPIT-4835
Manufacturer's date2009-04-01
NHTSA componentEXTERIOR LIGHTING:HEADLIGHTS:SWITCH

NHTSA's summary

GMC/CHEVROLET: HEADLAMP SWITCH INOP IN MANUAL MODE ONLY. HEADLIGHTS ARE ALWAYS FUNCTIONAL IN AUTOMATIC MODE. THIS COULD BE THE RESULT OF A RELAY INSTALLED IN THE INCORRECT POSITION WITH THE UBEC. *PE

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
CHEVROLET COLORADO2004, 2005, 2006, 2007, 2008, 2009
GMC CANYON2004, 2005, 2006, 2007, 2008, 2009

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

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
0708420052007-07-24. Service bulletin. RIGHT HEADLAMP BULB BURNS OUT. *KB UPDATED 08-15-07. *KB
3170E2006-02-16. Service bulletin. IPC, INTERIOR LIGHTS AND/OR HEADLAMPS FLICKER. *AK FB2