
Remanufactured Crate Engine for 2004-2005 Chevy/GMC Medium Duty Truck with 6.6L Duramax Turbo Diesel V8
This product is no longer available. Please call customer service for assistance at 1-800-345-4545.
Notes:
- VIN 2
- Head Cast #:409-1
- Block Cast #: 42351050314
- Broadcast IDs: YYM, YYP, YYZ, YYS, YYN
- Injectors mount outside valve cover
- 32 valves
Engine Break-In Procedure
Use conventional or break-in oil (non-synthetic) for the first 600 miles of operation. Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. Check the engine oil and coolant levels daily.
At 600 Miles change the engine oil and filter using conventional (non-synthetic) oil. Check fuel and ignition settings; adjust valves (where applicable).
After the first 5,000 of service synthetic engine oil may be used. Follow your vehicle owner’s manual for service intervals.
![Engine Assembly Lube [4 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28000.jpg)

![Break-In/Engine Oil Supplement [12 oz. Bottle]](https://www.jegs.com/images/mini_200/500/555/555-28060.jpg)
![Blue RTV, Temperature Resistant up to 500 degrees [3 oz. Tube]](https://www.jegs.com/images/mini_200/500/555/555-28030.jpg)