{"nhtsa_id":10030209,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-08-19","date":"2009-04-01","document_id":"PIT-4835","mfr_campaign":null,"replaces":null,"component":"EXTERIOR LIGHTING:HEADLIGHTS:SWITCH","mfr_system":null,"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","document":null,"url":"https://open.wenmarpro.com/bulletins/10030209","components":[{"id":"lighting","name":"Lighting","parent":null},{"id":"headlight","name":"Headlights","parent":"lighting"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"COLORADO","year_from":2004,"year_to":2009,"match":"exact","vehicle_ids":["2004_chevrolet_colorado","2005_chevrolet_colorado","2006_chevrolet_colorado","2007_chevrolet_colorado","2008_chevrolet_colorado","2009_chevrolet_colorado"]},{"make":"GMC","model":"CANYON","year_from":2004,"year_to":2009,"match":"exact","vehicle_ids":["2004_gmc_canyon","2005_gmc_canyon","2006_gmc_canyon","2007_gmc_canyon","2008_gmc_canyon","2009_gmc_canyon"]}],"as_of":"2026-10-19","note":"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.","attribution":[]}