About this item 

• New 6.6L Duramax Diesel Fuel Filter Housing fits 2001-04 Silverado Sierra 97780061, which includes a filter head, filter, and filter water sensor.Compatible models: Dorman 904-558 HD Diesel Fuel Filter Housing.Please note that this filter housing is not suitable for the 2004 LLY engine engine 
• When installing this filter housing outdoors in the cold, the O-ring inside the primer pump may freeze very stiff and easily leak. It is recommended to heat the primer pump before installation to soften the internal O-ring. Boiling water can be used for heating or placed next to the heater for baking and heating. 
• Direct replacement - this fuel filter housing matches the fit and function of the original filter housing 
• Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool 
• We will provide you with excellent after-sales service. If you have any questions during the ordering process, you can contact us. We are very happy to answer your questions and handle the pre-sales and after-sales services well! Please believe in us and make America great again!

Please note that when installing this filter housing in cold weather, the O-ring inside the prime pump may freeze very stiff. It is recommended to install it indoors and heat the "prime pump" to soften the O-ring to ensure no leakage 
The blue filter housing and electroplated filter head have a very beautiful appearance. 
This device is suitable for the following vehicles: 
2001-2004 Chevy Silverado 2500 HD Silverado 3500 6.6L 6599CC 403Cu In. V8 DIESEL OHV Turbocharged 
2001-2004 GMC Silverado 3500 Sierra 2500 HD 6.6L 6599CC 403Cu In. V8 DIESEL OHV Turbocharged