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The gas tank on the 2008 GMC Sierra-2500HD holds 34 gal..
It will hold about 14-17 gallons of gas
28 gallons
18 Gallons
12 Gallons
19.5 gallons
16 gallons
18.5 Gallons
16.5 gallons
31 gallons totally empty.
17 gallons maximum
19 us Gallons
29 gallons, but the other half is hybrid.