{"nhtsa_id":10033029,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2010-06-25","date":"2010-01-01","document_id":"SB-09271C","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)","mfr_system":null,"summary":"PONTIAC/SATURN/BUICK/GMC/CHEVROLET: TRANSMISSION CALIBRATION UPDATE. A SERVICE PROCEDURE TO REPROGRAM THE ECM AND TCM ON CERTAIN MODEL VEHICLES. THIS NEW CALIBRATION WILL IMPROVE TRANSMISSION SHIFT CHARACTERISTICS FOR DOWNSHIFT HESITATION, DELAYED SHIFTING, AND SHIFTING AT THE WRONG TIME. *PE","document":null,"url":"https://open.wenmarpro.com/bulletins/10033029","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"},{"id":"transmission-control-module","name":"Transmission control module","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"BUICK","model":"ENCLAVE","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_buick_enclave"]},{"make":"BUICK","model":"LACROSSE","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_buick_lacrosse"]},{"make":"CHEVROLET","model":"EQUINOX","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_chevrolet_equinox"]},{"make":"CHEVROLET","model":"MALIBU","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_chevrolet_malibu"]},{"make":"CHEVROLET","model":"TRAVERSE","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_chevrolet_traverse"]},{"make":"GMC","model":"ACADIA","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_gmc_acadia"]},{"make":"GMC","model":"TERRAIN","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_gmc_terrain"]},{"make":"PONTIAC","model":"G6","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_pontiac_g6"]},{"make":"SATURN","model":"AURA","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_saturn_aura"]},{"make":"SATURN","model":"OUTLOOK","year_from":2010,"year_to":2010,"match":"exact","vehicle_ids":["2010_saturn_outlook"]}],"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":[]}