{"nhtsa_id":39304,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1995-11-01","date":"1995-02-01","document_id":"376105","mfr_campaign":null,"replaces":"93-6A-111","component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","mfr_system":null,"summary":"COLD ENGINE KNOCK. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/39304","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"ASTRO","year_from":1990,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"C SERIES(LIGHT)","year_from":1990,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"G SERIES","year_from":1990,"year_to":1994,"match":"exact","vehicle_ids":["1990_chevrolet_g-series","1991_chevrolet_g-series","1992_chevrolet_g-series","1993_chevrolet_g-series","1994_chevrolet_g-series"]},{"make":"CHEVROLET","model":"P SERIES","year_from":1990,"year_to":1994,"match":"exact","vehicle_ids":["1990_chevrolet_p-series","1991_chevrolet_p-series","1992_chevrolet_p-series","1993_chevrolet_p-series","1994_chevrolet_p-series"]},{"make":"CHEVROLET","model":"S10","year_from":1990,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"SUBURBAN","year_from":1990,"year_to":1994,"match":"exact","vehicle_ids":["1990_chevrolet_suburban","1991_chevrolet_suburban","1992_chevrolet_suburban","1993_chevrolet_suburban","1994_chevrolet_suburban"]},{"make":"GMC","model":"C SERIES(LIGHT)","year_from":1990,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"G SERIES","year_from":1990,"year_to":1991,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"G SERIES","year_from":1993,"year_to":1993,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"JIMMY","year_from":1990,"year_to":1991,"match":"exact","vehicle_ids":["1990_gmc_jimmy","1991_gmc_jimmy"]},{"make":"GMC","model":"JIMMY","year_from":1992,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"P SERIES","year_from":1990,"year_to":1994,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SAFARI","year_from":1990,"year_to":1994,"match":"exact","vehicle_ids":["1990_gmc_safari","1991_gmc_safari","1992_gmc_safari","1993_gmc_safari","1994_gmc_safari"]},{"make":"GMC","model":"SUBURBAN","year_from":1990,"year_to":1994,"match":"exact","vehicle_ids":["1990_gmc_suburban","1991_gmc_suburban","1992_gmc_suburban","1993_gmc_suburban","1994_gmc_suburban"]},{"make":"OLDSMOBILE","model":"BRAVADA","year_from":1991,"year_to":1992,"match":"exact","vehicle_ids":["1991_oldsmobile_bravada","1992_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":[]}