{"nhtsa_id":619242,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2001-05-21","date":"2001-02-16","document_id":"160201","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:MANUAL TRANSMISSION","mfr_system":null,"summary":"THIS MESSAGE CONCERNS CERTAIN 1997 THROUGH 2001 MEDIUM DUTY TRUCKS WITH SPICER SEVEN SPEED MANUAL TRANSMISSIONS EXHIBITING HEAVY VIBRATION THAT INCREASES WITH SPEED AND / OR AN OIL LEAK AND / OR A CRACKED ENGINE BLOCK. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/619242","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"manual-transmission","name":"Manual transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"C SERIES","year_from":1997,"year_to":2001,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"T SERIES","year_from":1997,"year_to":2001,"match":"exact","vehicle_ids":["1997_chevrolet_t-series","1998_chevrolet_t-series","1999_chevrolet_t-series","2000_chevrolet_t-series","2001_chevrolet_t-series"]},{"make":"GMC","model":"C SERIES","year_from":1997,"year_to":2001,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"T SERIES","year_from":1997,"year_to":2001,"match":"exact","vehicle_ids":["1997_gmc_t-series","1998_gmc_t-series","1999_gmc_t-series","2000_gmc_t-series","2001_gmc_t-series"]}],"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":[]}