{"nhtsa_id":10038646,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2011-06-24","date":"2011-02-01","document_id":"PIT-5068","mfr_campaign":null,"replaces":null,"component":"SUSPENSION:FRONT","mfr_system":null,"summary":"GM: THE VEHICLE LEANS OR THERE IS A CLUNK NOISE IN THE FRONT SUSPENSION. THE TORSION BAR ADJUSTER ARM MAY BE FRACTURED. 2011 SILVERADO/SIERRA. *RM","document":null,"url":"https://open.wenmarpro.com/bulletins/10038646","components":[{"id":"suspension","name":"Suspension","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 2500","year_from":2011,"year_to":2011,"match":"base","vehicle_ids":["2011_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 3500","year_from":2011,"year_to":2011,"match":"base","vehicle_ids":["2011_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 2500","year_from":2011,"year_to":2011,"match":"base","vehicle_ids":["2011_gmc_sierra"]},{"make":"GMC","model":"SIERRA 3500","year_from":2011,"year_to":2011,"match":"base","vehicle_ids":["2011_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":[]}