{"nhtsa_id":10037554,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2011-05-25","date":"2011-02-01","document_id":"11-06-04-001","mfr_campaign":null,"replaces":"11-06-04-001A","component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"GM: THE MALFUNCTION LIGHT IS ON AND THE ENGINE PERFORMANCE IS POOR. *RM UPDATED ON 6/14/2011. *KB","document":null,"url":"https://open.wenmarpro.com/bulletins/10037554","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"EXPRESS","year_from":2010,"year_to":2011,"match":"exact","vehicle_ids":["2010_chevrolet_express","2011_chevrolet_express"]},{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2011,"year_to":2011,"match":"base","vehicle_ids":["2011_chevrolet_silverado"]},{"make":"GMC","model":"SAVANA","year_from":2010,"year_to":2011,"match":"exact","vehicle_ids":["2010_gmc_savana","2011_gmc_savana"]},{"make":"GMC","model":"SIERRA","year_from":2011,"year_to":2011,"match":"exact","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":[]}