{"nhtsa_id":52555,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-08-14","date":"1997-04-01","document_id":"9774L60E08A","mfr_campaign":null,"replaces":"66-71-03","component":"POWER TRAIN:AUTOMATIC TRANSMISSION","mfr_system":null,"summary":"AUTOMATIC TRANSMISSION 1-2 AND/OR 2-3 UPSHIFT SLIP/FLARE, NO 3RD OR 4TH GEAR, DTC P1870, LAUNCH SHUDDER (REVISE VCM WIRING). *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/52555","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null},{"id":"automatic-transmission","name":"Automatic transmission","parent":"powertrain"}],"codes":["P1870"],"topics":[],"vehicles":[{"make":"CHEVROLET","model":"ASTRO","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"BLAZER","year_from":1996,"year_to":1996,"match":"exact","vehicle_ids":["1996_chevrolet_blazer"]},{"make":"CHEVROLET","model":"C SERIES(LIGHT)","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"G SERIES","year_from":1996,"year_to":1996,"match":"exact","vehicle_ids":["1996_chevrolet_g-series"]},{"make":"CHEVROLET","model":"K SERIES","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"CHEVROLET","model":"P SERIES","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"C SERIES(LIGHT)","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"G SERIES","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"JIMMY","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"P3","year_from":1996,"year_to":1996,"match":null,"vehicle_ids":[]},{"make":"GMC","model":"SAFARI","year_from":1996,"year_to":1996,"match":"exact","vehicle_ids":["1996_gmc_safari"]}],"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":[]}