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Just purchased a used 2005 GMC 2500HD 6.6 diesel and it doesn't have the owners manual. How many quarts of oil does it hold? Thanks!
 

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Oil Capacity

I believe you will find that the 6.6 turbo-Diesel holds 12 quarts if the filter has been changed.
 

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just changed mine with the filer....10 qts...2.5 gallons
 

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10 qt is what i remember
 

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Owners Manuals Links

Just for reffrence, since you did not get the manuals for your truck, you can download them using these links, hope they work for you.

Owners Manual
https://www.mygmlink.com/pdf/go2cont...5silverado.pdf

GM Truck Warrantee Information
https://www.mygmlink.com/pdf/go2cont...chevcar_wm.pdf

Getting to know Your Silverado Supplement
https://www.mygmlink.com/pdf/go2cont...lveradogtk.pdf

Duramax Diesel Engine Supplement
https://www.mygmlink.com/pdf/go2cont...k05duramax.pdf

Allison Transmission Supplement
https://www.mygmlink.com/pdf/go2cont...allisongtk.pdf

John
 

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10 qts. with filter
 

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10 qts with filter.. plus or minus.

this is also in the FAQ at the top of the forum..
 

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I believe you will find that the 6.6 turbo-Diesel holds 12 quarts if the filter has been changed.
I believe you have a larger oil pan than I do then. Mine holds 10 quarts with a filter change--give or take a few ounces.
 

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...and just in case you want another quote of " :exactly: 10 quarts with the filter change" you now have it.
 

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I believe you will find that the 6.6 turbo-Diesel holds 12 quarts if the filter has been changed.
no way are you holding 12
 

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Put in 10 qt. Start it up, run a minute, shut it down, let it sit a few minutes then check oil level on dipstick. Bet it is right on the mark.
 
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