{"nhtsa_id":52572,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-08-21","date":"1997-06-01","document_id":"677153A","mfr_campaign":null,"replaces":"67-71-53","component":"ELECTRICAL SYSTEM:IGNITION:MODULE","mfr_system":null,"summary":"NO UPSHIFT/2ND GEAR ONLY AFTER COLD START-INTERMITTENT DTC 87 - HIGH RATIO ERROR (REPLACE EPROM). *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/52572","components":[{"id":"electrical","name":"Electrical system","parent":null},{"id":"ignition","name":"Ignition","parent":"electrical"}],"codes":[],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"C SERIES(LIGHT)","year_from":1994,"year_to":1995,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"G SERIES","year_from":1994,"year_to":1996,"match":"exact","vehicle_ids":["1994_chevrolet_g-series","1995_chevrolet_g-series","1996_chevrolet_g-series"]},{"make":"CHEVROLET","model":"K SERIES","year_from":1994,"year_to":1995,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"P SERIES","year_from":1994,"year_to":1994,"match":"exact","vehicle_ids":["1994_chevrolet_p-series"]},{"make":"CHEVROLET","model":"P SERIES","year_from":1995,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C SERIES(LIGHT)","year_from":1994,"year_to":1995,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"G SERIES","year_from":1994,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"K SERIES","year_from":1994,"year_to":1995,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"P SERIES","year_from":1994,"year_to":1996,"match":null,"vehicle_ids":[]}],"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":[]}