The fuel tank capacity for a 2003 Chevy Silverado 1500 truck will depend on what type of model You have. The standard models are going to have a fuel tank capacity of 26 US gallons. If You have a model that is equipped with a long bed then You're going to have a bigger tank that has a capacity of 34 US gallons. This truck is going to run perfectly fine on regular unleaded gasoline with an octane of 87 or higher. You don't need to use premium fuel but You can if You want in order to extend the life of Your truck.
Marjorie C
July 16, 2020
The gas tank in your 2003 Chevy silverado is equipped to hold 26 to 34 gallons of fuel.
Stevie B
January 19, 2022
My 2003 extended cab Silverado with a 6.5 foot bed and 5.3 L engine has a 26 gallon gas tank.
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