{"nhtsa_id":608377,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-11-24","date":"1999-08-01","document_id":"99027","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"GENERAL MOTORS HAS DECIDED THAT SOME VEHICLES EQUIPPED WITH 4.8L OR 5.3L ENGINES AND 4L60-E AUTOMATIC TRANSMISSIONS, AND VEHICLES EQUIPPED WITH 3.73 REAR AXLES AND ORDERED WITH THE HEAVY-DUTY TRAILERING PACKAGE MAY NOT HAVE INCLUDED THE MERCHANDISING-INTENT AUXILIARY TRANSMISSION OIL COOLER. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/608377","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":[]}