{"nhtsa_id":10112974,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-08-15","date":"2013-04-16","document_id":"PIP5110","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P0420. Technician will need to follow published Service Information diagnostics. Technician will check for a possible leak in the exhaust system behind the bank 1 sensor 2 O2 sensor. Technician will need to reposition the exhaust clamp or replace with a wider band clamp.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10112974-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2013/MC-10112974-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10112974","components":[{"id":"engine","name":"Engine","parent":null},{"id":"exhaust-emissions","name":"Exhaust and emissions","parent":null}],"codes":["P0420"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"EXPRESS","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_chevrolet_express","2012_chevrolet_express","2013_chevrolet_express"]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_chevrolet_silverado","2012_chevrolet_silverado","2013_chevrolet_silverado"]},{"make":"GMC","model":"SAVANA","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_gmc_savana","2012_gmc_savana","2013_gmc_savana"]},{"make":"GMC","model":"SIERRA","year_from":2011,"year_to":2013,"match":"exact","vehicle_ids":["2011_gmc_sierra","2012_gmc_sierra","2013_gmc_sierra"]},{"make":"GMC","model":"SIERRA DENALI","year_from":2011,"year_to":2013,"match":"base","vehicle_ids":["2011_gmc_sierra","2012_gmc_sierra","2013_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":[]}