GM Smooth Idler Pulley 2013-2023 GM 6.6L Duramax LML L5P 12611935
12611935 OE Smooth Idler Pulley.For 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 GM 6.6L Duramax LML L5P.
ACDelco# 15-4983
Bolt included. These are the 2 main pulleys and will not work in the third position found on some trucks.
 Third pulley 2013-2016 part# 98057284 Third pulley 2017-2023 part# 12626075
