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2020 GMC Sierra 2500HD Gas Tank Size & Fuel Capacity

Pickup 32 trims listed ← 2019 2021 →

Fuel tank capacity

36.0gal · 136 L

The 2020 GMC Sierra 2500HD has a fuel tank capacity of 36.0 gallons (136 liters) on every trim.

36.0 gal · Bigger than 98% of 2020 models we list.

Listed separately: 2020 GMC Sierra 1500 (24.0–28.0 gal), 2020 GMC Sierra 3500HD (36.0 gal).

Fuel
Regular unleaded
Tank sizes
1
Trims
32

2020 GMC Sierra 2500HD fuel tank capacity by trim

What changes the tank sizeTap an option to filter the table

Drive
no difference
Cab
no difference
Bed
no difference

All 32 trims

TrimEngineDrive Tank
2dr Regular Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
2dr Regular Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
4dr Crew Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
4dr Crew Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
4dr Crew Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
4dr Crew Cab SB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
4dr Double Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
4dr Double Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
4dr Double Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
4dr Double Cab SB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
AT4 4dr Crew Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
AT4 4dr Crew Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
Denali 4dr Crew Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
Denali 4dr Crew Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLE 2dr Regular Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLE 2dr Regular Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLE 4dr Crew Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLE 4dr Crew Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLE 4dr Crew Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLE 4dr Crew Cab SB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLE 4dr Double Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLE 4dr Double Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLE 4dr Double Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLE 4dr Double Cab SB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLT 4dr Crew Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLT 4dr Crew Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLT 4dr Crew Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLT 4dr Crew Cab SB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLT 4dr Double Cab 4WD LB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLT 4dr Double Cab 4WD SB 6.6L 8cyl 6A · 4WD 6.6L 8cyl 6A 4WD 36.0 gal136 L
SLT 4dr Double Cab LB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 L
SLT 4dr Double Cab SB 6.6L 8cyl 6A · RWD 6.6L 8cyl 6A RWD 36.0 gal136 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 2020 GMC Sierra 2500HD

$153.72 to fill the 36.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
36.0 galRegular$4.27$153.72$115.29

By region, 36.0-gallon tank

RegionRegular / galFill from empty
East Coast$4.02$144.72
Midwest$4.27$153.72
Gulf CoastLowest$3.70$133.20
Rocky Mountain$4.46$160.56
West Coast$5.42$195.12
CaliforniaHighest$5.89$212.04

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

  • 36.0-gallon tank$153.72

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

Sierra 2500HD tank size in other years

The 2020 Sierra 2500HD uses the same 36.0 gal tank as every Sierra 2500HD since 2011.

Model yearTankLongest highway range
2025 Sierra 2500HD 36.0 gal Not rated
2024 Sierra 2500HD 36.0 gal Not rated
2023 Sierra 2500HD 36.0 gal Not rated
2022 Sierra 2500HD 36.0 gal Not rated
2021 Sierra 2500HD 36.0 gal Not rated
2020 Sierra 2500HD 36.0 gal Not rated
2019 Sierra 2500HD 36.0 gal Not rated
2018 Sierra 2500HD 36.0 gal Not rated
2017 Sierra 2500HD 36.0 gal Not rated
2016 Sierra 2500HD 36.0 gal Not rated
2015 Sierra 2500HD 36.0 gal Not rated
GMC Sierra 2500HD fuel tank by model yearSmallest tank Larger tank options
20012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026
← 2019 GMC Sierra 2500HD Every Sierra 2500HD year 2021 GMC Sierra 2500HD →

2020 GMC Sierra 2500HD vs similar 2020 pickups

At 36.0 gallons, the Sierra 2500HD's largest tank ranks second of the four 2020 pickups compared here. The Ford F-350 Super Duty carries the most (48.0 gal) and the Nissan Titan XD the least (26.0 gal).

2020 modelTankLongest highway range
Ford F-350 Super Duty 34.0–48.0 gal Not rated
GMC Sierra 2500HD 36.0 gal Not rated
Chevrolet Silverado 2500HD 36.0 gal Not rated
Nissan Titan XD 26.0 gal 546 mi

Other 2020 pickups of a similar size, one model per brand.

2020 GMC Sierra 2500HD fuel system recalls

None of the 9 recalls NHTSA lists for the 2020 GMC Sierra 2500HD involve the fuel system.

All GMC fuel recalls Look up your tank by VIN

2020 GMC Sierra 2500HD fuel pump and gauge parts

NHTSA lists no fuel-system recall for the 2020 GMC Sierra 2500HD, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.

Fuel pump ACDelco 12692704 Listed for the 2020 GMC Sierra 2500HD. 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 filter ACDelco TP1015 Listed for the 2020 GMC Sierra 2500HD. A clogged filter starves the engine under load. On many newer cars it sits inside the tank with the pump. Check price on Amazon

As an Amazon Associate we earn from qualifying purchases.

Frequently asked questions

What is the fuel tank capacity of the 2020 GMC Sierra 2500HD?

The 2020 GMC Sierra 2500HD holds 36.0 gallons (136 liters) on every trim we list.

How many gallons and liters does the 2020 GMC Sierra 2500HD gas tank hold?

The 2020 GMC Sierra 2500HD tank holds 136 liters, or 36.0 gallons in US gallons.

Does 4WD change the 2020 GMC Sierra 2500HD gas tank?

No. 4WD and RWD versions of the 2020 GMC Sierra 2500HD use the same 36.0 gal tank.

What gas does the 2020 GMC Sierra 2500HD take?

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

How much does it cost to fill up a 2020 GMC Sierra 2500HD?

At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 36.0-gallon tank from empty costs $153.72. It ranges from $133.20 in the Gulf Coast to $212.04 in California.

How much does a full tank of gas weigh in a 2020 GMC Sierra 2500HD?

About 223 pounds for the 36.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.

Does the 2020 GMC Sierra 2500HD have a bigger gas tank than the Ford F-350 Super Duty?

No. The 2020 Ford F-350 Super Duty holds up to 48.0 gallons; the 2020 GMC Sierra 2500HD holds up to 36.0.

Has the 2020 GMC Sierra 2500HD had a fuel pump or fuel system recall?

No. None of the 9 recalls NHTSA lists for the 2020 GMC Sierra 2500HD involve the fuel system.

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).
  • Recalls: NHTSA recall database (GMC fuel system recalls).

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

Other 2020 GMC models

Acadia19.0–22.0 gallons Canyon21.0 gallons Savana31.0 gallons Savana Cargo31.0 gallons Sierra 150024.0–28.0 gallons Sierra 3500HD36.0 gallons Terrain14.9–15.6 gallons Yukon26.0 gallons Yukon XL31.0 gallons