{"nhtsa_id":628815,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-03-21","date":"2001-12-01","document_id":"010730043","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"SUBJECT REGARDING DIAGNOSTIC TIPS FOR SLIPPING OR MISSING SECOND, THIRD AND/OR FOURTH GEAR. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/628815","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_cadillac_escalade"]},{"make":"CHEVROLET","model":"ASTRO","year_from":2001,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"BLAZER","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_blazer","2002_chevrolet_blazer"]},{"make":"CHEVROLET","model":"CAMARO","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_camaro","2002_chevrolet_camaro"]},{"make":"CHEVROLET","model":"CORVETTE","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_corvette","2002_chevrolet_corvette"]},{"make":"CHEVROLET","model":"EXPRESS","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_express","2002_chevrolet_express"]},{"make":"CHEVROLET","model":"S10","year_from":2001,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"SILVERADO","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_silverado","2002_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SUBURBAN","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_chevrolet_suburban","2002_chevrolet_suburban"]},{"make":"CHEVROLET","model":"TRAILBLAZER","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_chevrolet_trailblazer"]},{"make":"GMC","model":"ENVOY","year_from":2002,"year_to":2002,"match":"exact","vehicle_ids":["2002_gmc_envoy"]},{"make":"GMC","model":"JIMMY","year_from":2001,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SAFARI","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_gmc_safari","2002_gmc_safari"]},{"make":"GMC","model":"SAVANA","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_gmc_savana","2002_gmc_savana"]},{"make":"GMC","model":"SIERRA","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_gmc_sierra","2002_gmc_sierra"]},{"make":"GMC","model":"SONOMA","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_gmc_sonoma","2002_gmc_sonoma"]},{"make":"GMC","model":"TAHOE","year_from":2001,"year_to":2002,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"YUKON","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_gmc_yukon","2002_gmc_yukon"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_oldsmobile_bravada","2002_oldsmobile_bravada"]},{"make":"PONTIAC","model":"FIREBIRD","year_from":2001,"year_to":2002,"match":"exact","vehicle_ids":["2001_pontiac_firebird","2002_pontiac_firebird"]}],"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":[]}