{"nhtsa_id":10078572,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2016-08-10","date":"2016-05-01","document_id":"SB-16-NA-133","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:12V/24V/48V BATTERY","mfr_system":null,"summary":"THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE ECM TO CORRECT A CUSTOMER CONCERN THAT THE BATTERY IS NOT MAINTAINING CORRECT VOLTAGE (LOW), AND CAUSING UP-FITTED EQUIPMENT TO HAVE POOR PERFORMANCE DUE TO INCORRECT ECM CALIBRATION CAUSING LOW VOLTAGE CHARGING RATE.","document":null,"url":"https://open.wenmarpro.com/bulletins/10078572","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"battery","name":"12-volt battery","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"EXPRESS","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_chevrolet_express"]},{"make":"GMC","model":"SAVANA","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_gmc_savana"]}],"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":[]}