{"nhtsa_id":613606,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-07-25","date":"2000-05-01","document_id":"00015","mfr_campaign":null,"replaces":null,"component":"EXTERIOR LIGHTING","mfr_system":null,"summary":"ON SOME MEDIUM DUTY TRUCKS EQUIPPED WITH A DIESEL ENGINE, AIR BRAKES, AND THE ENGINE SHUTDOWN FEATURE, THE MULTI-FUNCTION ALARM MODULE MAY NOT PERFORM CERTAIN FEATURES SUCH AS: NO WARNING TONE FOR AIR BRAKE LOW PRESSURE; NO WARNING TONE FOR CHECK GAGES; NO LOW COOLANT TELLTALE LAMP OR WARNING TONE; AND NO ENGINE SHUTDOWN FUNCTION FOR LOW COOLANT OR LOW OIL PRESSURE OR HIGH COOLANT TEMPERATURE. **MR","document":null,"url":"https://open.wenmarpro.com/bulletins/613606","components":[{"id":"lighting","name":"Lighting","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"C6500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"C7500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"T6500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"T7500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C6500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C7500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"T6500","year_from":1998,"year_to":1998,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"T7500","year_from":1998,"year_to":1998,"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":[]}