{"nhtsa_id":10005451,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-02-27","date":"2004-01-01","document_id":"00574A","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM","mfr_system":null,"summary":"ALLISON LCT1000 NO SHIFT, SPEEDOMETER ERRATIC/INOPERATIVE, DIAGNOSTIC TROUBLE CODES (DTCS) P0721, C0237 POSSIBLE ANTI-LOCK BRAKE SYSTEM (ABS) LAMP ON. SI BULLETIN 1408789. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10005451","components":[{"id":"electrical","name":"Electrical system","parent":null}],"codes":["C0237","P0721"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":2001,"year_to":2004,"match":"exact","vehicle_ids":["2001_chevrolet_silverado","2002_chevrolet_silverado","2003_chevrolet_silverado","2004_chevrolet_silverado"]},{"make":"GMC","model":"SIERRA","year_from":2001,"year_to":2004,"match":"exact","vehicle_ids":["2001_gmc_sierra","2002_gmc_sierra","2003_gmc_sierra","2004_gmc_sierra"]}],"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":[]}