{"nhtsa_id":607694,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-10-05","date":"1999-08-01","document_id":"990421004","mfr_campaign":null,"replaces":"867403","component":"POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; POWER TRAIN:AUTOMATIC TRANSMISSION:LEVER AND LINKAGE:COLUMN SHIFT","mfr_system":null,"summary":"SOME PICKUPS AND FULL-SIZE UTILITY MODELS WITH AN AUTOMATIC TRANSFER CASE MAY EXHIBIT A BUMP / CLUNK UPON ACCELERATION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/607694","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"differential","name":"Differential","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":1999,"year_to":2000,"match":"exact","vehicle_ids":["1999_cadillac_escalade","2000_cadillac_escalade"]},{"make":"CHEVROLET","model":"K1","year_from":1998,"year_to":2000,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"K2","year_from":1998,"year_to":2000,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"K1","year_from":1998,"year_to":2000,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"K2","year_from":1998,"year_to":2000,"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":[]}