Buy OEM GENERAL MOTORS Part # 12387291. Differential Pinion Seal (Front). All Models. Differential Pinion Seal - Repair or Replace If you have a leaking differential pinion

Seal. Pinion. Differential Drive P/GR.
Differential Pinion Seal. Ring Gear 11.50".

Differential Pinion Seal

Fits C3500 , C3500 , C3500HD, C3500HD, K3500 , K3500

All Models.
Differential Pinion Seal - Repair or Replace
If you have a leaking differential pinion seal, a technician will remove the driveshaft from your and replaced it with the most up-to-date OEM replacement available.