{"nhtsa_id":50563,"type":"service_bulletin","type_name":"Service bulletin","date_added":"1997-05-27","date":"1996-12-01","document_id":"108150A","mfr_campaign":null,"replaces":"10-81-50","component":"POWER TRAIN","mfr_system":null,"summary":"SOME VEHICLES MAY DISPLAY A CONDITION AT 70 MPH WHERE THE SPEEDOMETER READS ABOUT 4 MPH FASTER OR SLOWER THAN HUD. *TW","document":null,"url":"https://open.wenmarpro.com/bulletins/50563","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"PONTIAC","model":"BONNEVILLE","year_from":1992,"year_to":1997,"match":"exact","vehicle_ids":["1992_pontiac_bonneville","1993_pontiac_bonneville","1994_pontiac_bonneville","1995_pontiac_bonneville","1996_pontiac_bonneville","1997_pontiac_bonneville"]}],"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":[]}