{"nhtsa_id":10070289,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-06-09","date":"2013-12-06","document_id":"PB-13430","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; EQUIPMENT; SUSPENSION:REAR:AXLE:NON-POWERED AXLE ASSEMBLY","mfr_system":null,"summary":"\"13430 - CUSTOMER SATISFACTION. CERTAIN VEHICLES, EQUIPPED WITH A 3.73 REAR AXLE RATIO (GT4) AND LOCKING REAR DIFFERENTIAL (G80), MAY HAVE A REAR AXLE PINION NUT THAT IS IMPROPERLY FASTENED. THIS COULD CAUSE A GEAR WHINE, CLICKING, GRINDING, OR A MOAN NOISE FROM THE REAR AXLE. DEALERS ARE TO REFASTEN THE PINION NUT.\"","document":null,"url":"https://open.wenmarpro.com/bulletins/10070289","components":[{"id":"equipment","name":"Equipment and accessories","parent":null},{"id":"suspension","name":"Suspension","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA 1500","year_from":2014,"year_to":2014,"match":"base","vehicle_ids":["2014_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":[]}