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2007 GMC Sierra 2500HD Classic Gas Tank Size & Fuel Capacity

Pickup 46 trims listed

Fuel tank capacity

26.0–34.0gal · 98–129 L

The 2007 GMC Sierra 2500HD Classic has a fuel tank capacity of 26.0 to 34.0 gallons (98–129 liters), depending on the trim. The most common size is 34.0 gallons, used on 26 trims.

34.0 gal · Bigger than 93% of 2007 models we list.

Listed separately: 2007 GMC Sierra 2500HD (26.0–34.0 gal).

Fuel
Regular unleaded
Tank sizes
2
Trims
46

2007 GMC Sierra 2500HD Classic fuel tank capacity by trim

What changes the tank sizeTap an option to filter the table

Drive
no difference
Cab
Bed
Engine

All 46 trims

TrimEngineDrive Tank
SL1 4dr Crew Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SL1 4dr Crew Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SL1 4dr Extended Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SL1 4dr Extended Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SLE1 4dr Crew Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SLE1 4dr Crew Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SLE1 4dr Extended Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SLE1 4dr Extended Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SLE2 4dr Crew Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SLE2 4dr Crew Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SLE2 4dr Extended Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SLE2 4dr Extended Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SLT 4dr Crew Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SLT 4dr Crew Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SLT 4dr Extended Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
SLT 4dr Extended Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
Work Truck 4dr Crew Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
Work Truck 4dr Crew Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
Work Truck 4dr Extended Cab 4WD SB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 26.0 gal98 L
Work Truck 4dr Extended Cab SB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 26.0 gal98 L
SL1 2dr Regular Cab 4WD LB 6.0L 8cyl 5M · 4WD 6.0L 8cyl 5M 4WD 34.0 gal129 L
SL1 2dr Regular Cab LB 6.0L 8cyl 5M · RWD 6.0L 8cyl 5M RWD 34.0 gal129 L
SL1 4dr Crew Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SL1 4dr Crew Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SL1 4dr Extended Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SL1 4dr Extended Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SLE1 2dr Regular Cab 4WD LB 6.0L 8cyl 5M · 4WD 6.0L 8cyl 5M 4WD 34.0 gal129 L
SLE1 2dr Regular Cab LB 6.0L 8cyl 5M · RWD 6.0L 8cyl 5M RWD 34.0 gal129 L
SLE1 4dr Crew Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SLE1 4dr Crew Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SLE1 4dr Extended Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SLE1 4dr Extended Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SLE2 4dr Crew Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SLE2 4dr Crew Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SLE2 4dr Extended Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SLE2 4dr Extended Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SLT 4dr Crew Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SLT 4dr Crew Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
SLT 4dr Extended Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
SLT 4dr Extended Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
Work Truck 2dr Regular Cab 4WD LB 6.0L 8cyl 5M · 4WD 6.0L 8cyl 5M 4WD 34.0 gal129 L
Work Truck 2dr Regular Cab LB 6.0L 8cyl 5M · RWD 6.0L 8cyl 5M RWD 34.0 gal129 L
Work Truck 4dr Crew Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
Work Truck 4dr Crew Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L
Work Truck 4dr Extended Cab 4WD LB 6.0L 8cyl 4A · 4WD 6.0L 8cyl 4A 4WD 34.0 gal129 L
Work Truck 4dr Extended Cab LB 6.0L 8cyl 4A · RWD 6.0L 8cyl 4A RWD 34.0 gal129 L

Tank figures are the manufacturer's rated capacity, sorted smallest tank first. The EPA doesn't rate fuel economy for heavy-duty pickups and vans (over 8,500 lb gross vehicle weight), so these trims have no official MPG or range.

What it costs to fill up a 2007 GMC Sierra 2500HD Classic

$145.18 to fill the 34.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
26.0 galRegular$4.27$111.02$83.26
34.0 galRegular$4.27$145.18$108.88

By region, 34.0-gallon tank

RegionRegular / galFill from empty
East Coast$4.02$136.68
Midwest$4.27$145.18
Gulf CoastLowest$3.70$125.80
Rocky Mountain$4.46$151.64
West Coast$5.42$184.28
CaliforniaHighest$5.89$200.26

Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.

Your own price

  • 26.0-gallon tank$111.02
  • 34.0-gallon tank$145.18

Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.

Sierra 2500HD Classic tank size in other years

2007 is the first Sierra 2500HD Classic model year we list.

Model yearTankLongest highway range
2007 Sierra 2500HD Classic 26.0–34.0 gal Not rated
Every Sierra 2500HD Classic year

2007 GMC Sierra 2500HD Classic vs similar 2007 pickups

At 34.0 gallons, the Sierra 2500HD Classic's largest tank ranks third of the five 2007 pickups compared here. The Ford F-250 Super Duty carries the most (38.0 gal) and the Toyota Tundra the least (26.4 gal).

2007 modelTankLongest highway range
Ford F-250 Super Duty 29.0–38.0 gal Not rated
Dodge Ram Pickup 2500 34.0–35.0 gal Not rated
GMC Sierra 2500HD Classic 26.0–34.0 gal Not rated
Chevrolet Silverado 2500HD Classic 26.0–34.0 gal Not rated
Toyota Tundra 26.4 gal 502 mi

Other 2007 pickups of a similar size, one model per brand.

2007 GMC Sierra 2500HD Classic fuel pump and gauge parts

These are the part numbers the makers list for the 2007 GMC Sierra 2500HD Classic. Check the fuel system recalls first: recall repairs are free.

Fuel pump US Motor Works USEP12046 Listed for the 2007 GMC Sierra 2500HD Classic. For hard starts, stalling or a whining tank. Pumps can differ by engine and tank size, so check your trim on Amazon. Check price on Amazon Fuel level sending unit ACDelco MU1228 Listed for the 2007 GMC Sierra 2500HD Classic. For a fuel gauge that reads wrong, jumps around or sits on empty. Check price on Amazon Fuel tank strap ACDelco 23126454 Listed for the 2007 GMC Sierra 2500HD Classic. Rusted straps let the tank sag or drop. Replace them in pairs. Check price on Amazon Fuel filler neck Spectra Premium FN770 Listed for the 2007 GMC Sierra 2500HD Classic. A rusted filler neck leaks fumes and can set an EVAP check-engine code. Check price on Amazon

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Frequently asked questions

What is the fuel tank capacity of the 2007 GMC Sierra 2500HD Classic?

The 2007 GMC Sierra 2500HD Classic holds between 26.0 and 34.0 gallons, depending on the trim. 34.0 gallons is the usual size; the smaller 26.0-gallon tank is on the SL1 4dr Crew Cab 4WD SB.

How many gallons and liters does the 2007 GMC Sierra 2500HD Classic gas tank hold?

The 2007 GMC Sierra 2500HD Classic tank holds 98–129 liters, or 26.0–34.0 gallons in US gallons.

Which 2007 GMC Sierra 2500HD Classic has the biggest gas tank?

The 34.0-gallon tank is on the SL1 2dr Regular Cab 4WD LB, SL1 2dr Regular Cab LB, SL1 4dr Crew Cab 4WD LB and 23 other trims. The smallest tank, 26.0 gallons, is on the SL1 4dr Crew Cab 4WD SB.

Does 4WD change the 2007 GMC Sierra 2500HD Classic gas tank?

No. 4WD and RWD versions of the 2007 GMC Sierra 2500HD Classic use the same 26.0–34.0 gal tank.

What gas does the 2007 GMC Sierra 2500HD Classic take?

Regular unleaded. The label inside the fuel door confirms it for your car.

How much does it cost to fill up a 2007 GMC Sierra 2500HD Classic?

At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 34.0-gallon tank from empty costs $145.18. It ranges from $125.80 in the Gulf Coast to $200.26 in California.

How much does a full tank of gas weigh in a 2007 GMC Sierra 2500HD Classic?

About 211 pounds for the 34.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.

Does the 2007 GMC Sierra 2500HD Classic have a bigger gas tank than the Chevrolet Silverado 2500HD Classic?

No, they match: both top out at 34.0 gallons in 2007.

Sources

  • Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
  • MPG and range: EPA ratings. Range is tank size times EPA MPG.
  • Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).

Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.

Other 2007 GMC models

Acadia22.0 gallons Canyon19.0 gallons Envoy22.0 gallons Savana31.0 gallons Savana Cargo31.0 gallons Sierra 150026.0–34.0 gallons Sierra 1500 Classic26.0–34.0 gallons Sierra 1500HD Classic26.0 gallons Sierra 2500HD26.0–34.0 gallons Sierra 3500 Classic34.0–35.0 gallons Sierra 3500HD34.0 gallons Yukon26.0 gallons