{"nhtsa_id":637914,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-12-09","date":"2002-02-01","document_id":"42","mfr_campaign":null,"replaces":null,"component":"EXTERIOR LIGHTING:TURN SIGNAL:FLASHER UNIT","mfr_system":null,"summary":"OWNERS MAY COMMENT THAT THE TURN SIGNAL ON THEIR 2000 - 2002 FULL SIZE PICKUP OR UTILITY MODEL FLASHES FASTER THAN ON OTHER VEHICLES OF THE SAME MODEL. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/637914","components":[{"id":"lighting","name":"Lighting","parent":null},{"id":"turn-signal","name":"Turn signals","parent":"lighting"}],"codes":[],"topics":[],"vehicles":[{"make":"GMC","model":"GMC TRUCK","year_from":2000,"year_to":2002,"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":[]}