{"nhtsa_id":10030591,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2009-10-23","date":"2010-11-01","document_id":"SB-070842006C","mfr_campaign":null,"replaces":"SB-070842006E","component":"EXTERIOR LIGHTING:TURN SIGNAL; EXTERIOR LIGHTING:TURN SIGNAL:FLASHER UNIT","mfr_system":null,"summary":"GENERAL MOTORS: BCM CALIBRATIONS AVAILABLE TO RESTORE BULB OUTAGE DETECTION ON VEHICLES PRODUCED BY A SECOND STATE MANUFACTURER, TURN SIGNALS FLASH FAST AFTER FACTORY BOX REMOVED (UPFITTER). MAY NEED TO HAVE BODY CONTROL MODULE (BCM) REAR TURN SIGNAL BULB OUTAGE DETECTION CAPABILITY CHANGED. *PE UPDATED 5/20/11. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10030591","components":[{"id":"lighting","name":"Lighting","parent":null},{"id":"turn-signal","name":"Turn signals","parent":"lighting"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2007,"year_to":2009,"match":"exact","vehicle_ids":["2007_chevrolet_silverado","2008_chevrolet_silverado","2009_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA","year_from":null,"year_to":null,"match":"exact","vehicle_ids":[]},{"make":"GMC","model":"SIERRA","year_from":2007,"year_to":2009,"match":"exact","vehicle_ids":["2007_gmc_sierra","2008_gmc_sierra","2009_gmc_sierra"]}],"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":[]}