Description
Replace your worn out or missing oil cap with the Genuine GM 12677347 / FC261 Engine Oil Cap, designed specifically for 2017–2025 Chevy Silverado & GMC Sierra HD trucks equipped with the 6.6L L5P Duramax diesel.
This is an OEM GM/ACDelco part, engineered and tested to meet the same durability and performance standards as the cap that came on your truck from the factory. Perfect fit, proper sealing, and long-term reliability — backed directly by General Motors.
Features:
– Genuine GM / ACDelco OE Part
– Correct fit for L5P 6.6L Duramax engines (2017–2025)
– Maintains proper oil system sealing and pressure
– Direct replacement for factory oil fill cap
– Durable OE-grade materials for long service life
– Backed by General Motors quality & testing
Part Numbers:
GM Part Number: 12677347
ACDelco Part Number: FC261
Replaces: 12673857, 12683621
UPC: 808709554943
Fitment:
2017–2025 Chevrolet Silverado 2500HD / 3500HD (6.6L L5P Duramax)
2017–2025 GMC Sierra 2500HD / 3500HD (6.6L L5P Duramax)
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