{"nhtsa_id":10022691,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2007-09-20","date":"2012-02-01","document_id":"PIT-4056","mfr_campaign":null,"replaces":"PIT-4056G","component":"SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE","mfr_system":null,"summary":"GMC: UNABLE TO COMMUNICATE WITH THE EBCM DTC U0121. *NJ VEHICLES EQUIPPED WITH JL4. UPDATED 9/30/08. *PE UPDATED 6/27/11. *PE UPDATED 4/6/12. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10022691","components":[{"id":"brakes","name":"Brakes","parent":null},{"id":"abs","name":"Anti-lock brakes","parent":"brakes"}],"codes":["U0121"],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":2007,"year_to":2008,"match":"exact","vehicle_ids":["2007_cadillac_escalade","2008_cadillac_escalade"]},{"make":"CADILLAC","model":"ESCALADE ESV","year_from":2008,"year_to":2009,"match":"base","vehicle_ids":["2008_cadillac_escalade","2009_cadillac_escalade"]},{"make":"CADILLAC","model":"ESCALADE EXT","year_from":2008,"year_to":2009,"match":"base","vehicle_ids":["2008_cadillac_escalade","2009_cadillac_escalade"]},{"make":"CHEVROLET","model":"AVALANCHE","year_from":2007,"year_to":2009,"match":"exact","vehicle_ids":["2007_chevrolet_avalanche","2008_chevrolet_avalanche","2009_chevrolet_avalanche"]},{"make":"CHEVROLET","model":"AVALANCHE 1500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_chevrolet_avalanche","2008_chevrolet_avalanche"]},{"make":"CHEVROLET","model":"AVALANCHE 1500","year_from":2011,"year_to":2011,"match":"base","vehicle_ids":["2011_chevrolet_avalanche"]},{"make":"CHEVROLET","model":"AVALANCHE 2500","year_from":2007,"year_to":2007,"match":"base","vehicle_ids":["2007_chevrolet_avalanche"]},{"make":"CHEVROLET","model":"CAMARO","year_from":2010,"year_to":2011,"match":"exact","vehicle_ids":["2010_chevrolet_camaro","2011_chevrolet_camaro"]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2007,"year_to":2007,"match":"exact","vehicle_ids":["2007_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2009,"year_to":2009,"match":"exact","vehicle_ids":["2009_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_chevrolet_silverado","2008_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 2500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_chevrolet_silverado","2008_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 3500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_chevrolet_silverado","2008_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SUBURBAN","year_from":2009,"year_to":2009,"match":"exact","vehicle_ids":["2009_chevrolet_suburban"]},{"make":"CHEVROLET","model":"SUBURBAN 1500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_chevrolet_suburban","2008_chevrolet_suburban"]},{"make":"CHEVROLET","model":"SUBURBAN 2500","year_from":2008,"year_to":2008,"match":"base","vehicle_ids":["2008_chevrolet_suburban"]},{"make":"CHEVROLET","model":"TAHOE","year_from":2007,"year_to":2009,"match":"exact","vehicle_ids":["2007_chevrolet_tahoe","2008_chevrolet_tahoe","2009_chevrolet_tahoe"]},{"make":"CHEVROLET","model":"TRAVERSE","year_from":2009,"year_to":2011,"match":"exact","vehicle_ids":["2009_chevrolet_traverse","2010_chevrolet_traverse","2011_chevrolet_traverse"]},{"make":"GMC","model":"SIERRA","year_from":2008,"year_to":2008,"match":"exact","vehicle_ids":["2008_gmc_sierra"]},{"make":"GMC","model":"SIERRA 1500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_gmc_sierra","2008_gmc_sierra"]},{"make":"GMC","model":"SIERRA 2500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_gmc_sierra","2008_gmc_sierra"]},{"make":"GMC","model":"SIERRA 3500","year_from":2007,"year_to":2008,"match":"base","vehicle_ids":["2007_gmc_sierra","2008_gmc_sierra"]},{"make":"GMC","model":"YUKON","year_from":2007,"year_to":2008,"match":"exact","vehicle_ids":["2007_gmc_yukon","2008_gmc_yukon"]}],"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":[]}