{"nhtsa_id":6089929,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2000-02-29","date":"1999-12-01","document_id":"99027B","mfr_campaign":null,"replaces":"99027A","component":"POWER TRAIN:AUTOMATIC TRANSMISSION:COOLING UNIT AND LINES","mfr_system":null,"summary":"A CONDITION WITH THE AUXILIARY TRANSMISSION OIL COOLER OMITTED FROM CERTAIN VEHICLES EQUIPPED WITH HEAVY DUTY TRAILERING PACKAGE (Z82). *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/6089929","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"SILVERADO","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SUBURBAN","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_chevrolet_suburban"]},{"make":"CHEVROLET","model":"TAHOE","year_from":1999,"year_to":1999,"match":"exact","vehicle_ids":["1999_chevrolet_tahoe"]}],"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":[]}