42 gallons
About 45 gallons
42 IS THE ANWSER
The 1998 K2500 Suburban has a 44 gallon gas tank.
1500 is 31 gallon and 2500 is 39 gallon
9 to 13 LBS. NO higher are lower.
The 2003 Chevrolet Suburban runs on flex-fuel (FFV).
The 2014 Chevrolet Suburban runs on flex-fuel (FFV).
The 2006 Chevrolet Suburban runs on flex-fuel (FFV).
The 2004 Chevrolet Suburban runs on flex-fuel (FFV).
The 2015 Chevrolet Suburban runs on flex-fuel (FFV).
The 2010 Chevrolet Suburban runs on flex-fuel (FFV).
According to 4x4review.com, the fuel tank capacity for the 1/2 ton 2003 Chevrolet suburban is 31 gallons (117 liters) and the 3/4 ton is 37.5 gallons (142 liters).