{"nhtsa_id":606523,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1999-08-26","date":"1999-06-01","document_id":"990602012","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"CONDITIONS WITH HEATER INOPERATIVE, BLOWS COLD AIR, ENGINE OVERHEATS, AND RUST IN THE COOLANT SYSTEM. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/606523","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"BLAZER","year_from":1996,"year_to":1997,"match":"exact","vehicle_ids":["1996_chevrolet_blazer","1997_chevrolet_blazer"]},{"make":"CHEVROLET","model":"S10","year_from":1996,"year_to":1997,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"SONOMA","year_from":1996,"year_to":1997,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"JIMMY","year_from":1996,"year_to":1997,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"S10 PICKUP","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SONOMA","year_from":1996,"year_to":1997,"match":"exact","vehicle_ids":["1996_gmc_sonoma","1997_gmc_sonoma"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":1996,"year_to":1997,"match":"exact","vehicle_ids":["1996_oldsmobile_bravada","1997_oldsmobile_bravada"]}],"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":[]}