{"nhtsa_id":10006289,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-04-27","date":"2004-01-01","document_id":"01746","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING:ENGINE","mfr_system":null,"summary":"4.2 5.3 LL8 LM4 ENGINE WITH DIAGNOSTIC TROUBLE CODE P2120 OR P2122 OR P2123 OR P2127 OR P2128. *MR","document":null,"url":"https://open.wenmarpro.com/bulletins/10006289","components":[{"id":"engine","name":"Engine","parent":null}],"codes":["P2120","P2122","P2123","P2127","P2128"],"topics":[],"vehicles":[{"make":"BUICK","model":"RAINIER","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_buick_rainier"]},{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_chevrolet_trailblazer"]},{"make":"GMC","model":"ENVOY","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_gmc_envoy"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":2004,"year_to":2004,"match":"exact","vehicle_ids":["2004_oldsmobile_bravada"]}],"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":[]}