Coolant Bypass Tube O-ring for 2001-2016 LB7 LLY LBZ LMM LML 6.6l Duramax

Coolant bypass tube upper o-ring.
This o-ring is installed on the slip fit between the bypass tube and thermostat housing.
It is common to accidently tear this o-ring when installing the bypass tube.

Fits: 2001-2016 LB7 LLY LBZ LMM LML 6.6l Duramax