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01-16 GM 6.6L Duramax LB7/LLY/LBZ/LMM/LML Dorman Idler Pulley

Fits: 2001-2016 Gm 6.6L Duramax LB7/LLY/LBZ/LML

This Dorman 419-623 Idler Pulley for your 2001-2016 GM 6.6L Duramax is built to route the serpentine belt for proper alignment with the accessory drive belt, thereby keeping the alternator charging, the water pump running, and the power steering pump and A/C compressor operating properly. 


  • Direct Fit
  • Stop Squeaks & Other Noises
  • Replaces GM Part # 98072072

Dorman: 419-623

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