{"vehicle":{"id":"2001_gmc_b7","year":2001,"make":"GMC","model":"B7"},"code":"P1221","generic":false,"description":null,"bulletins":{"as_of":"2026-10-19","count":1,"bulletins":[{"nhtsa_id":629495,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2002-04-02","date":"2002-02-01","document_id":"020604005","mfr_campaign":null,"component":"ENGINE AND ENGINE COOLING:ENGINE:GASOLINE","summary":"SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVICE MANUAL INFORMATION. *TT","document":null,"url":"https://open.wenmarpro.com/bulletins/629495"}],"url":"https://open.wenmarpro.com/makes/gmc/b7/2001/bulletins?code=P1221"},"related":{"components":[],"bulletins":[],"recalls":{"may_apply":true,"recalls":[],"lookup":{"nhtsa":"https://www.nhtsa.gov/recalls","tc":"https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng","maker":null}}},"url":"https://open.wenmarpro.com/makes/gmc/b7/2001/codes/P1221","note":"The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.","attribution":["Contains information licensed under the Open Government Licence – Canada."]}