Now this is just a rough estimate based on my last fill ,but it looks like it might be more of less 18 gallons.
The 2014 GMC Sierra has a fuel tank capacity of 26 gallons.
20 gallons
20 gallons.
20
If you mean inches, it can hold up to 6,739.95 gallons. If you mean feet, it can hold up to 11,646,630.24 gallons.
about 18 gallons
The gas tank on the 2014 GMC Sierra-3500HD holds 36.0 gal..
The gas tank on the 2014 GMC Sierra-2500HD holds 36.0 gal..
The gas tank on the 2014 GMC Sierra-1500 holds 26.0 gal..
25 gallons
The 1500 holds 25 gallons.
900 gallons read a manual!
17
A 1992 Sierra GMC will hold approximately 34 gallons of gas. Drivers should expect gas mileage between 14 and 17 miles per gallon.
The gas tank on the 2012 GMC Sierra-2500HD holds 36 gal..
The gas tank on the 2008 GMC Sierra-3500HD holds 34 gal..
The gas tank on the 2010 GMC Sierra-3500HD holds 34 gal..
The gas tank on the 2006 GMC Sierra-2500HD holds 34 gal..