{"nhtsa_id":634523,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-10-03","date":"2002-04-01","document_id":"020842004","mfr_campaign":null,"replaces":null,"component":"ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH","mfr_system":null,"summary":"ON CERTAIN 2002 AND PRIOR PASSENGER CARS AND TRUCKS WITH AUTOMATIC HEADLAMP CONTROL AND VACUUM FLUORESCENT PRNDL INDICATOR INSTRUMENT PANEL CLUSTER, THE PRNDL DISPLAY REDUCED VISIBILITY FOR APPROXIMATELY ONE MINUTE. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/634523","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"wiring","name":"Wiring and fuses","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"BUICK","model":"BUICK","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CADILLAC","model":"CADILLAC","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"CHEVROLET","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"GMC","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"OLDSMOBILE","model":"OLDSMOBILE","year_from":null,"year_to":null,"match":null,"vehicle_ids":[]},{"make":"PONTIAC","model":"PONTIAC","year_from":null,"year_to":null,"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":[]}