{"nhtsa_id":39297,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-11-01","date":"1995-02-01","document_id":"468203","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH","mfr_system":null,"summary":"INOPERATIVE OR ERRATIC SPEEDOMETER AND/OR VEHICLE SHIFTS DOWN INTO SECOND GEAR OR WILL NOT SHIFT OUT OF SECOND GEAR. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/39297","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"wiring","name":"Wiring and fuses","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"ASTRO","year_from":1993,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"C SERIES(LIGHT)","year_from":1993,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C SERIES(LIGHT)","year_from":1993,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SAFARI","year_from":1993,"year_to":1994,"match":"exact","vehicle_ids":["1993_gmc_safari","1994_gmc_safari"]}],"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":[]}