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2018 GMC Acadia Gas Tank Size & Fuel Capacity

SUV 11 trims listed 1 fuel-system recall ← 2017 2019 →

Fuel tank capacity

19.0–22.0gal · 72–83 L

The 2018 GMC Acadia has a fuel tank capacity of 19.0 to 22.0 gallons (72–83 liters), depending on the trim. The most common size is 19.0 gallons, used on 6 trims.

A full tank is good for roughly 475–550 highway miles or 342–462 miles around town, going by the EPA ratings.

22.0 gal · Bigger than 80% of 2018 models we list.

Highway range
475–550 mi
City range
342–462 mi
Fuel
Regular unleaded
EPA combined
20–23 MPG
EPA size class
Standard Sport Utility Vehicle

2018 GMC Acadia fuel tank capacity by trim

What changes the tank sizeTap an option to filter the table

Drive
Engine
no difference

All 11 trims

MPG and range are city / highway.

TrimEngineDrive Tank MPG city / hwy Range city / hwy
Denali 4dr SUV 3.6L 6cyl 6A · FWD MPG 18 / 25Range 342 / 475 mi 3.6L 6cyl 6A FWD 19.0 gal72 L 18 / 25 342 / 475 mi
SL 4dr SUV 2.5L 4cyl 6A · FWD MPG 21 / 26Range 399 / 494 mi 2.5L 4cyl 6A FWD 19.0 gal72 L 21 / 26 399 / 494 mi
SLE-1 4dr SUV 2.5L 4cyl 6A · FWD MPG 21 / 26Range 399 / 494 mi 2.5L 4cyl 6A FWD 19.0 gal72 L 21 / 26 399 / 494 mi
SLE-2 4dr SUV 2.5L 4cyl 6A · FWD MPG 21 / 26Range 399 / 494 mi 2.5L 4cyl 6A FWD 19.0 gal72 L 21 / 26 399 / 494 mi
SLT-1 4dr SUV 2.5L 4cyl 6A · FWD MPG 21 / 26Range 399 / 494 mi 2.5L 4cyl 6A FWD 19.0 gal72 L 21 / 26 399 / 494 mi
SLT-2 4dr SUV 3.6L 6cyl 6A · FWD MPG 18 / 25Range 342 / 475 mi 3.6L 6cyl 6A FWD 19.0 gal72 L 18 / 25 342 / 475 mi
Denali 4dr SUV AWD 3.6L 6cyl 6A · AWD MPG 17 / 25Range 374 / 550 mi 3.6L 6cyl 6A AWD 22.0 gal83 L 17 / 25 374 / 550 mi
SLE-1 4dr SUV AWD 2.5L 4cyl 6A · AWD MPG 21 / 25Range 462 / 550 mi 2.5L 4cyl 6A AWD 22.0 gal83 L 21 / 25 462 / 550 mi
SLE-2 4dr SUV AWD 2.5L 4cyl 6A · AWD MPG 21 / 25Range 462 / 550 mi 2.5L 4cyl 6A AWD 22.0 gal83 L 21 / 25 462 / 550 mi
SLT-1 4dr SUV AWD 3.6L 6cyl 6A · AWD MPG 17 / 25Range 374 / 550 mi 3.6L 6cyl 6A AWD 22.0 gal83 L 17 / 25 374 / 550 mi
SLT-2 4dr SUV AWD 3.6L 6cyl 6A · AWD MPG 17 / 25Range 374 / 550 mi 3.6L 6cyl 6A AWD 22.0 gal83 L 17 / 25 374 / 550 mi

Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.

How far a 2018 GMC Acadia goes on a tank

Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 23 MPG, a full 19.0-gallon tank covers about 437 miles.

GaugeGallonsHighway milesCity miles
Full19.0494399
3/414.3371299
1/29.5247200
1/44.8124100
1/82.46250

Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 652 gallons, roughly 34 full tanks.

Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.

EPA combined
20–23 MPG
Tailpipe CO2
386–442 g/mi
EPA greenhouse score
4–5 of 10
Source
EPA ratings

What it costs to fill up a 2018 GMC Acadia

$81.13 to fill the 19.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
19.0 galRegular$4.27$81.13$60.85
22.0 galRegular$4.27$93.94$70.45

By region, 19.0-gallon tank

RegionRegular / galFill from empty
East Coast$4.02$76.38
Midwest$4.27$81.13
Gulf CoastLowest$3.70$70.30
Rocky Mountain$4.46$84.74
West Coast$5.42$102.98
CaliforniaHighest$5.89$111.91

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

  • 19.0-gallon tank$81.13
  • 22.0-gallon tank$93.94
  • A year of driving (15,000 mi)$2,785

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

Acadia tank size in other years

The 2018 Acadia uses the same 19.0–22.0 gal tank sizes as the 2017 model.

Model yearTankLongest highway range
2023 Acadia 19.4–21.7 gal 586 mi
2022 Acadia 19.0–21.7 gal 586 mi
2021 Acadia 19.0–22.0 gal 594 mi
2020 Acadia 19.0–22.0 gal 594 mi
2019 Acadia 19.0–22.0 gal 550 mi
2018 Acadia 19.0–22.0 gal 550 mi
2017 Acadia 19.0–22.0 gal 550 mi
2016 Acadia 22.0 gal 484 mi
2015 Acadia 22.0 gal 528 mi
2014 Acadia 22.0 gal 528 mi
2013 Acadia 22.0 gal 528 mi
GMC Acadia fuel tank by model yearSmallest tank Larger tank options
20072008200920102011201220132014201520162017201820192020202120222023
← 2017 GMC Acadia Every Acadia year 2019 GMC Acadia →

2018 GMC Acadia vs similar 2018 SUVs

The Acadia has the largest tank of the seven 2018 SUVs compared here, 22.0 gallons against 21.1 for the Dodge Journey.

2018 modelTankLongest highway range
GMC Acadia 19.0–22.0 gal 550 mi
Dodge Journey 20.5–21.1 gal 513 mi
Honda Pilot 19.5 gal 527 mi
Nissan Murano 19.0 gal 532 mi
Kia Sorento 18.8 gal 526 mi
Hyundai Santa Fe 18.8 gal 470 mi
Volkswagen Tiguan 15.3–15.9 gal 429 mi

Other 2018 SUVs of a similar size, one model per brand.

2018 GMC Acadia fuel system recalls

NHTSA lists 1 fuel-system recall for the 2018 GMC Acadia, out of 2 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.

Delivery · Fuel pumpMay 31, 2018 · NHTSA 18V358000 · General Motors Llc · 895 vehicles

General Motors LLC (GM) is recalling certain 2015-2018 GMC Canyon, 2016-2017 Buick Envision, 2016-2018 Chevrolet Colorado and Malibu, 2017-2018 GMC Acadia, 2018 Buick LaCrosse, Cadillac ATS, Chevrolet Equinox, and GMC Terrain vehicles. The high pressure fuel pump may detach from its mounting flange, possibly resulting in the pump damaging the high pressure fuel line.

Risk and remedy

Risk: A damaged fuel line can create a fuel leak, increasing the risk of a fire.

Remedy: GM will notify owners, and dealers will replace the high pressure fuel pump, and high pressure fuel pipe, free of charge. The recall began July 2, 2018. Owners may contact Buick customer service at 1-800-521-7300, Cadillac customer service at 1-800-458-8006, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is 18188.

All GMC fuel recalls Look up your tank by VIN

Frequently asked questions

What is the fuel tank capacity of the 2018 GMC Acadia?

The 2018 GMC Acadia holds between 19.0 and 22.0 gallons, depending on the trim. 19.0 gallons is the usual size; the 22.0-gallon tank comes on the Denali 4dr SUV AWD (3.6L 6cyl 6A).

How many gallons and liters does the 2018 GMC Acadia gas tank hold?

The 2018 GMC Acadia tank holds 72–83 liters, or 19.0–22.0 gallons in US gallons.

Which 2018 GMC Acadia has the biggest gas tank?

The 22.0-gallon tank is on the Denali 4dr SUV AWD, SLE-1 4dr SUV AWD, SLE-2 4dr SUV AWD and 2 other trims. The smallest tank, 19.0 gallons, is on the Denali 4dr SUV.

Does AWD change the 2018 GMC Acadia gas tank?

Yes. FWD: 19.0 gal; AWD: 22.0 gal.

How far can a 2018 GMC Acadia go on a full tank?

About 475–550 miles on the highway and 342–462 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.

How many miles can a 2018 GMC Acadia go on a quarter tank?

About 124 highway miles or 100 in town from the 19.0-gallon tank, which has roughly 4.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.

What gas does the 2018 GMC Acadia take?

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

How much does it cost to fill up a 2018 GMC Acadia?

At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 19.0-gallon tank from empty costs $81.13. It ranges from $70.30 in the Gulf Coast to $111.91 in California.

How much does a full tank of gas weigh in a 2018 GMC Acadia?

About 136 pounds for the 22.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.

Does the 2018 GMC Acadia have a bigger gas tank than the Nissan Murano?

Yes. The 2018 GMC Acadia holds up to 22.0 gallons; the 2018 Nissan Murano holds up to 19.0.

Has the 2018 GMC Acadia had a fuel pump or fuel system recall?

Yes. NHTSA lists 1 fuel-system recall for the 2018 GMC Acadia: 18V358000 (delivery · fuel pump). Check your VIN at nhtsa.gov/recalls to see if your car is affected.

Sources

  • Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
  • MPG and range: EPA ratings (fueleconomy.gov). 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 2018 GMC models

Canyon21.0 gallons Savana31.0 gallons Savana Cargo31.0 gallons Sierra 150026.0–34.0 gallons Sierra 2500HD36.0 gallons Sierra 3500HD36.0 gallons Terrain14.9–15.6 gallons Yukon26.0 gallons Yukon XL31.0 gallons