{"nhtsa_id":10008842,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2004-08-24","date":"2004-01-01","document_id":"3007","mfr_campaign":null,"replaces":null,"component":"EQUIPMENT:ELECTRICAL","mfr_system":null,"summary":"SPEEDOMETER INDICATOR NEEDLE FLUCTUATES AT COLD START UP. THE SPEEDOMETER IS ERRATIC AND THE CHECK ENGINE LIGHT FLASHES WHEN THE VEHICLE REACHES 48 TO 50 MPH AFTER A COLD START UP. 2004 CHEVROLET AND GMC MEDIUM DUTY CONVENTIONAL C65/75/85 MODELS WITH CATERPILLAR ENGINES AND ALLISON 2400 SERIES AUTOMATIC TRANSMISSION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/10008842","components":[{"id":"equipment","name":"Equipment and accessories","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"UNKNOWN","model":"UNKNOWN","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":[]}