GM Genuine Parts
GM Genuine Parts Thermostat Bypass Pipe Seal 12658352 | 2017-2023 Duramax 6.6L L5P
GM Genuine Parts Thermostat Bypass Pipe Seal 12658352 | 2017-2023 Duramax 6.6L L5P
SKU:12658352
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Thermostat Bypass Pipe Upper O-Ring
This replacement upper O-ring is designed for the thermostat bypass pipe, helping maintain a proper seal and prevent coolant leaks.
- Direct replacement upper O-ring
- Seals the thermostat bypass pipe connection
- Helps prevent coolant leaks
- Recommended during water pump service
