The gas tank on the 2006 Chevrolet Corvette holds 18.0 gal..
The gas tank on the 2006 Chevrolet Impala holds 17 gal..
The gas tank on the 2006 Chevrolet Malibu holds 16 gal..
The gas tank on the 2006 Chevrolet Express holds 31.0 gal..
The gas tank on the 2006 Chevrolet Suburban holds 31 gal..
The gas tank on the 2006 Chevrolet Colorado holds 19 gal..
The gas tank on the 2006 Chevrolet Tahoe holds 26 gal..
The gas tank on the 2006 Chevrolet Equinox holds 17 gal..
The gas tank on the 2006 Chevrolet Silverado-1500 holds 26.0 gal..
The gas tank on the 2006 Chevrolet Silverado-2500HD holds 34.0 gal..
16 gallons
26 Gallons (From the Chevrolet website)