{"nhtsa_id":10203136,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-11-05","date":"2021-10-26","document_id":"KC-131","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE","mfr_system":null,"summary":"Mack Chassis - Differential Lock Status Alarm And Icon; Differential Lock Alarm Tone Does Not Sound For Entire Duration Of Differential Lock Engagement","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203136-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10203136-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10203136","components":[{"id":"driver-assistance","name":"Driver assistance","parent":null},{"id":"electrical","name":"Electrical system","parent":null},{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"instrument-cluster","name":"Instrument cluster","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"MACK","model":"E-TECH","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]}],"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":[]}