OE rear engine covers on the 6.6L Duramax tend to weep coolant as the gasket ages. Fleece's thicker billet block-off plate uses an integral square-cut O-ring so no separate gasket is required.
Direct replacement for GM 97941204 and 12698239.
Owners of 2001-2025 GM 2500/3500 6.6L Duramax trucks with a leaking rear coolant cover.
| Engine | 6.6L Duramax 2001-2025 |
|---|---|
| Replaces | GM 97941204, 12698239 |
| Seal | Integral square-cut O-ring |
| Warranty | 1-year limited parts (Fleece) |
| Shipping weight | 2 lb |
Professional install available at Powertech Diesel, Idaho Falls — call 208-542-7793.
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