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How many miles per gallon does a 2007 Chevy Silverado 3500 diesel get?

Typically about 15 miles per gallon combined, with highway mileage commonly in the upper teens (roughly 17–19 mpg) and city or heavy-load driving pulling this down to about 11–14 mpg.


For the 2007 Silverado 3500 HD, the standard powertrain is the 6.6-liter Duramax diesel paired with an Allison six-speed automatic. Vehicle configuration matters a lot: two-wheel drive versus four-wheel drive, single rear wheel (SRW) versus dual rear wheel (DRW), and the cab/bed setup all influence real-world fuel economy. Official EPA numbers for this heavy-duty segment are less inline with the way these trucks are used than for lighter pickups, so most owners rely on experience reports and typical ranges rather than a single rating.


Overview of fuel economy for the 2007 Silverado 3500 Diesel


Fuel economy on the 2007 Duramax-powered Silverado 3500 is largely determined by drivetrain and usage. When powered by the Duramax LBZ engine with the Allison automatic, highway driving tends to yield the best numbers, while towing, hauling payload, or navigating city traffic lowers mpg. Real-world figures vary widely based on configuration, load, and driving style.


How mpg varies by drivetrain and configuration


The following ranges reflect typical real-world results reported by owners for different configurations of the 2007 Duramax Silverado 3500 (note: 2WD vs 4WD, SRW vs DRW and cab style can shift these numbers).



  • 2WD, SRW (single rear wheel): ~16–19 mpg highway; ~11–14 mpg city; ~13–16 mpg combined

  • 2WD, DRW (dual rear wheels): ~15–18 mpg highway; ~11–13 mpg city; ~13–15 mpg combined

  • 4WD, SRW: ~15–18 mpg highway; ~11–13 mpg city; ~13–15 mpg combined

  • 4WD, DRW: ~14–17 mpg highway; ~11–12 mpg city; ~12–14 mpg combined


These figures are broad ranges intended to reflect typical usage. Real-world mileage can be higher or lower depending on payload, towing, terrain, and maintenance.


Factors that affect fuel economy


Several variables influence the mpg you’ll see from a 2007 Silverado 3500 diesel. The most important include drivetrain configuration, payload and towing weight, driving conditions, tire size and pressure, maintenance, and driving habits. Heavier loads, hilly terrain, and frequent stops will reduce efficiency, while steady highway cruising with proper maintenance can improve it.


To help you maximize efficiency, consider the following practical tips tailored to this era of heavy-duty diesel trucks.


Tips to maximize fuel economy


Simple, proactive steps can help you squeeze more miles per gallon from a 2007 Duramax Silverado 3500, especially when you’re not towing or working hard with a heavy payload.



  • Keep tires inflated to the manufacturer’s recommended pressures; underinflation hurts mpg and handling.

  • Perform regular maintenance: replace air filters, keep fuel injectors clean, and follow recommended oil change intervals with the correct viscosity.

  • Maintain a steady speed on highways and use cruise control when appropriate to minimize unnecessary acceleration and braking.

  • Avoid excessive idling; shut the engine off during long stops when feasible.

  • Lighten payload when possible and distribute weight evenly to reduce rolling resistance.


Following these practices won’t turn a heavy-duty diesel into a fuel-sipping compact, but they can help you stay closer to the higher end of the typical range.


Summary


The 2007 Chevy Silverado 3500 diesel, powered by the Duramax 6.6L and an Allison automatic, typically delivers mid-teens fuel economy in mixed use, with highway mileage often in the upper teens and city/hauling scenarios dipping into the low-teens. Fuel economy varies substantially based on drivetrain (2WD vs 4WD, SRW vs DRW), payload, towing, terrain, and driving habits. For buyers and owners, expect roughly 13–17 mpg combined across configurations, and implement maintenance and driving practices aimed at preserving efficiency.


In the end, the best way to gauge what to expect is to consider your specific configuration (2WD/4WD, SRW/DRW, cab/bed setup) and your typical use (daily commuting vs heavy towing). Real-world experience from similar trucks and responsible maintenance are your most reliable sources of a precise number.

What year should I have my Chevy Silverado 3500 to avoid?


The 2012 Silverado 3500HD stands out as the worst model year according to CarComplaints.com, with numerous issues reported by owners. A major concern is the dashboard cracking, even in low-mileage vehicles. Some owners experienced this problem with as little as 26,000 miles on the odometer.



What is the towing capacity of the 2007 Chevy Silverado 3500 engine 6.6 L V8 diesel?


2007 Silverado 3500HD Highlights

Base MSRP Excludes Destination Fee$29,075
Seating6 seats
DrivetrainRear Wheel Drive Four Wheel Drive rear wheel drive
Max Towing Capacity13,000 lbs.
Warranty3 years / 36,000 miles



How many miles per gallon does a 2007 Chevy 3500 diesel get?


The price to pay for that impressive towing power is dirty injectors and a clogged air filter. Achieving 13-15 mpg is more in line with what you should expect, and 11 mpg isn't too far off from that. Adjusting how you distribute weight on the truck can also impact towing fuel economy.



What fuel mileage does a 6.6 l Duramax diesel get?


But we're going to double check. That. Actual mileage 19.57 hope you're having a great day subscribe for more.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.