How many gallons of diesel does a Dodge 3500 hold?
The typical diesel fuel tank on a Dodge Ram 3500 is 34 gallons.
Fuel tank size can vary by model year, cab and bed configuration, and available options. The 34-gallon tank is common on modern Ram 3500 diesels, but exact capacity should be confirmed in your vehicle’s documentation or with the dealer for your specific build.
Common diesel tank capacity
Before detailing the typical capacity, note that tank size can differ based on year and configuration. The following reflects what most owners encounter in current Ram 3500 diesels.
- 34 gallons — standard tank size for most modern Ram 3500 diesel models (6.7L Cummins Turbo Diesel) across common cab and bed configurations.
- Some older or specialized configurations may differ slightly; always verify with the build sheet or owner’s manual for your exact VIN.
For precise capacity, consult your vehicle’s documentation or VIN-based spec sheet.
Verifying the exact capacity for your truck
Because tank size can vary with year, trim, and options, use these sources to confirm the capacity for your specific build.
- Window sticker (Monroney label) on a new truck or the official dealer invoice for used trucks that shows fuel capacity.
- Owner’s manual where the fuel tank capacity is listed under technical specifications.
- VIN-based spec lookup through the manufacturer or a RAM dealer, which will return the exact tank size for your vehicle.
In short, the official capacity for modern Ram 3500 diesels is typically 34 gallons, but always verify for your exact truck to be sure.
Summary
Answer: The Dodge Ram 3500’s diesel tank is typically 34 gallons. Exact capacity can vary with configuration and year, so check the owner’s manual, VIN, or dealer records for your specific truck to confirm. The available range on a full tank depends on MPG and payload conditions.
How big is the gas tank on a 2015 RAM 3500 diesel?
32.0 gal
Fuel & MPG
0/0 mi. 32.0 gal.
How many gallons does a 6.7 Cummins hold?
The oil capacity of a 6.7 Cummins varies based on the model year. Engines produced after model year 2010 need 12 quarts of oil, or 3 gallons of oil. Previous models have different oil capacities, with some older 6.7 Cummins engines having an oil capacity of less than 12 quarts and others requiring more.
How big is the DEF tank on a 2025 Ram 3500?
IMPRESSIVE AVAILABLE FUEL TANK CAPACITY
Be in it for the long haul with a Largest-in-Class available fuel tank capacity of 50 gallons 5 on 2025 Ram 3500 Crew Cab models with eight-foot bed.
How many gallons does a RAM 3500 diesel hold?
50-gal
RAM 3500 Highlights
Engine: 410 HP 6.4L Hemi® V8 engine, 370 HP 6.7L Cummins® Turbo Diesel I6, or 420 HP 6.7L Cummins® Turbo Diesel I6 engine. Performance: Up to 37,090 pounds of towing capacity, largest-in-class 50-gal fuel tank capacity, and integrated towing hardware.
