Product Description
Restore a leak-free seal at the L5P coolant bypass with the MAHLE C33755 Coolant Water Bypass Gasket for 2017–2020 GM 6.6L Duramax. OE-style materials and geometry ensure reliable sealing and proper operating temperature after service.
Fitment
- 2017–2020 Chevrolet Silverado 2500HD / 3500HD – 6.6L Duramax L5P
- 2017–2020 GMC Sierra 2500HD / 3500HD – 6.6L Duramax L5P
Cross-Reference / Related Mahle Items (CPP Diesel links)
- MAHLE C33756 – Coolant Pipe O-Ring (L5P)
- MAHLE C31900 – Thermostat Housing Gasket (01–16 Duramax)
- MAHLE GS33752 – Water Pump Gasket Kit (01–10 Duramax)
Notes
Clean mating surfaces, inspect for corrosion/burrs, and torque fasteners per OEM spec. Refill and bleed the cooling system after reassembly.
FAQ
Will this fit my 2017–2020 L5P Duramax?
Yes. This gasket is listed for 2017–2020 Chevrolet/GMC 2500HD/3500HD with the 6.6L L5P engine.
Is it an OE-style replacement?
Yes. MAHLE designs C33755 to meet factory fit and function.
Do I need sealant?
Typically no—install clean and dry unless the service manual calls for sealant at this joint.
Specifications for Mahle C33755
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | C33755 |
| Engine Compatibility | 2017–2020 GM 6.6L Duramax L5P |
| UPC | 639789314475 |
| GTIN | 00639789314475 |
| Shipping | Calculated at Checkout (shipping insurance optional at checkout) |
| Prop 65 | This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Learn more |
