* Engine: The Silverado 1500 offers a range of engines, from smaller, more fuel-efficient options to larger, more powerful engines that consume more fuel.
* Drivetrain: 4x2 (rear-wheel drive) models generally get better gas mileage than 4x4 (four-wheel drive) models.
* Cab and bed size: Larger cabs and longer beds add weight, reducing fuel economy.
* Towing and hauling: Towing or hauling heavy loads significantly reduces fuel economy.
* Driving style: Aggressive driving habits reduce fuel economy.
Therefore, there's no single answer to your question. However, you can expect EPA estimates to range from approximately 15 mpg combined for a heavily equipped 4x4 model with a larger engine to 20+ mpg combined for a more lightly equipped 4x2 model with a smaller, more efficient engine.
To get the most accurate estimate for a specific Silverado 1500 configuration, you should check the EPA's FuelEconomy.gov website or consult the window sticker of the particular truck you're interested in.
