{"nhtsa_id":10126138,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2017-12-22","date":"2016-08-05","document_id":"GCUS-3-642","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"49270 - Customer Satisfaction. Certain vehicles, may have a condition in which engine oil may leak into the engine coolant from within the engine oil cooler core. Engine oil in the coolant system may lead to an over-temperature condition. Dealers will inspect the manufacture date of the engine oil cooler and for presence of engine oil in the engine coolant reservoir. The dealer will replace the engine oil cooler if necessary. In rare occurrences, engine replacement may be required.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10126138-9999.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2016/MC-10126138-0001.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10126138","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"CT6","year_from":2016,"year_to":2016,"match":"exact","vehicle_ids":["2016_cadillac_ct6"]}],"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":[]}