GM 94011603 Water Pump Coolant Bypass Tube Lower O-Ring Seal LB7 LLY LBZ LMM LML

This is a genuine GM OEM water pump coolant bypass tube lower o-ring. This o-ring goes on top of the water pump body at the 2 bolt flange. Its always best practice to use sealant or grease to hold this o-ring in its sealing groove during assembly.

Fitment:

2001-2016 6.6L Duramax