{"nhtsa_id":11015646,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-03-17","date":"2025-03-12","document_id":"PIT6352","mfr_campaign":null,"replaces":null,"component":"UNKNOWN OR OTHER","mfr_system":null,"summary":"This Preliminary information communicates A vehicle may come to the dealer with a service high voltage message and P29BB. The dealer is advised not to replace the heater. They are to clear the code and advise the customer that engineering is working on a design improvement.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11015646-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11015646-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11015646","components":[],"codes":["P29BB"],"topics":[],"vehicles":[{"make":"CADILLAC","model":"LYRIQ","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_cadillac_lyriq"]},{"make":"CADILLAC","model":"OPTIQ","year_from":2025,"year_to":2025,"match":"exact","vehicle_ids":["2025_cadillac_optiq"]},{"make":"CHEVROLET","model":"BLAZER EV","year_from":2024,"year_to":2025,"match":"base","vehicle_ids":["2024_chevrolet_blazer","2025_chevrolet_blazer"]},{"make":"CHEVROLET","model":"EQUINOX EV","year_from":2024,"year_to":2025,"match":"base","vehicle_ids":["2024_chevrolet_equinox","2025_chevrolet_equinox"]}],"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":[]}