{"nhtsa_id":10023636,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2008-01-18","date":"2007-12-01","document_id":"07338","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"SERVICE UPDATE FOR INVENTORY VEHICLES ONLY - COLD START P1400 ON-BOARD DIAGNOSTIC (OBD) SYSTEM IMPROVEMENT - REPROGRAM ECM-EXPIRES JUNE 30, 2008. *NJ","document":null,"url":"https://open.wenmarpro.com/bulletins/10023636","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P1400"],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":2008,"year_to":2008,"match":"exact","vehicle_ids":["2008_cadillac_escalade"]},{"make":"GMC","model":"SIERRA","year_from":2008,"year_to":2008,"match":"exact","vehicle_ids":["2008_gmc_sierra"]},{"make":"GMC","model":"YUKON","year_from":2008,"year_to":2008,"match":"exact","vehicle_ids":["2008_gmc_yukon"]},{"make":"HUMMER","model":"H2 SUT","year_from":2008,"year_to":2008,"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":[]}