{"nhtsa_id":11025492,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-11-12","date":"2025-11-06","document_id":"25-NA-339","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"Under Field Actions N252494000, N252494001, the service procedure includes performing a PICO test on vehicle engines within the identified suspect VIN population. If the engine passes the PICO test, the engine oil will be changed from 0W20 to Mobil 1 Supercar 0W40 dexosR. From that point forward, the engine must use 0W40 dexosR oil products for all future oil change services.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11025492-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11025492-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11025492","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"CADILLAC","model":"ESCALADE","year_from":2021,"year_to":2024,"match":"exact","vehicle_ids":["2021_cadillac_escalade","2022_cadillac_escalade","2023_cadillac_escalade","2024_cadillac_escalade"]},{"make":"CADILLAC","model":"ESCALADE ESV","year_from":2021,"year_to":2024,"match":"exact","vehicle_ids":["2021_cadillac_escalade-esv","2022_cadillac_escalade-esv","2023_cadillac_escalade-esv","2024_cadillac_escalade-esv"]},{"make":"CHEVROLET","model":"SILVERADO 1500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_chevrolet_silverado","2022_chevrolet_silverado","2023_chevrolet_silverado","2024_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 2500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_chevrolet_silverado","2022_chevrolet_silverado","2023_chevrolet_silverado","2024_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SILVERADO 3500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_chevrolet_silverado","2022_chevrolet_silverado","2023_chevrolet_silverado","2024_chevrolet_silverado"]},{"make":"CHEVROLET","model":"SUBURBAN","year_from":2021,"year_to":2024,"match":"exact","vehicle_ids":["2021_chevrolet_suburban","2022_chevrolet_suburban","2023_chevrolet_suburban","2024_chevrolet_suburban"]},{"make":"CHEVROLET","model":"SUBURBAN 1500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_chevrolet_suburban","2022_chevrolet_suburban","2023_chevrolet_suburban","2024_chevrolet_suburban"]},{"make":"CHEVROLET","model":"TAHOE","year_from":2021,"year_to":2024,"match":"exact","vehicle_ids":["2021_chevrolet_tahoe","2022_chevrolet_tahoe","2023_chevrolet_tahoe","2024_chevrolet_tahoe"]},{"make":"GMC","model":"SIERRA 1500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_gmc_sierra","2022_gmc_sierra","2023_gmc_sierra","2024_gmc_sierra"]},{"make":"GMC","model":"SIERRA 2500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_gmc_sierra","2022_gmc_sierra","2023_gmc_sierra","2024_gmc_sierra"]},{"make":"GMC","model":"SIERRA 3500","year_from":2021,"year_to":2024,"match":"base","vehicle_ids":["2021_gmc_sierra","2022_gmc_sierra","2023_gmc_sierra","2024_gmc_sierra"]},{"make":"GMC","model":"YUKON","year_from":2021,"year_to":2024,"match":"exact","vehicle_ids":["2021_gmc_yukon","2022_gmc_yukon","2023_gmc_yukon","2024_gmc_yukon"]},{"make":"GMC","model":"YUKON XL","year_from":2021,"year_to":2024,"match":"exact","vehicle_ids":["2021_gmc_yukon-xl","2022_gmc_yukon-xl","2023_gmc_yukon-xl","2024_gmc_yukon-xl"]},{"make":"GMC","model":"YUKON XL 1500","year_from":2023,"year_to":2023,"match":"base","vehicle_ids":["2023_gmc_yukon-xl"]}],"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":[]}