Cummins Engine

Thanks very much for the info. I will follow up with a call to HR/Monaco.

Monaco's Number is (800) 509-3417. They will need either your coach number, which is on the RVIA sticker outside the door or the last 6 digits of the VIN. Ask them to email you the original build sheet. It contains all 'extras' installed on your coach along with the serial numbers including the tires on that particular coach....Dennis

Call holiday Rambler and they can give you the data sheet on the coach based on the VIN, will have all the original equipment model #'s and S/N's

Check out info.....
https://library.rvusa.com/brochure/HolidayRambler2007ambassador.pdf

There is a metal placard on the right side (as you face the front of the eng) of the timing cover with all that info on it.

I believe it would be ISC 330hp, 8.3 liter

I don't know if you have it yet, but HR does offer the manual online.

https://www.holidayrambler.com/resources/media/manuals/2007_Ambassador.pdf

The engine is listed on page 220 as a
ISC 330HP
8.3L 506 CuIn

Filter and fluid info is on the same page