{"nhtsa_id":620850,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-08-31","date":"2001-08-29","document_id":"290801","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"SUBJECT REGARDING CALIBRATIONS AVAILABLE TO CORRECT UNRESOLVED DIAGNOSTIC TROUBLE CODE P0014, DELAYS IN TRANSMISSION DOWNSHIFTING AND COMPLAINTS OF FAN NOISE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/620850","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P0014"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_chevrolet_trailblazer"]}],"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":[]}