GMC Acadia Gas Tank Size

The GMC Acadia has a gas tank size ranging from 19.0 to 22.0 gallons depending on its drivetrain and model year. Learn more here!
Written by Pat Roache
Reviewed by Jessica Barrett
Updated on Nov 03, 2022
The GMC Acadia has a gas tank size ranging from 19.0 to 22.0 gallons depending on its drivetrain and model year. All AWD Acadias come with 22.0 gallons of fuel tank capacity while FWD models from 2017 and later come with 19.0 gallons.
Budgeting for your fuel costs is more important than ever with the recent surge of inflation in the U.S. economy, and knowing your gas tank size makes the task much easier!
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How big is the gas tank on a GMC Acadia?

The GMC Acadia has had an incredibly consistent production run since 2009, and its gas tank size has barely changed in the 13+ years. Most Acadia models have a 22.0-gallon gas tank size, but 2WD/FWD models from 2017 and later come with a 19.0-gallon gas tank size. Here’s how the Acadia’s gas tank sizes break down across model years:
  • 2009-2016 FWD Acadia: 22.0 gallons
  • 2009-2016 AWD Acadia: 22.0 gallons
  • 2017-present FWD Acadia: 19.0 gallons
  • 2017-present AWD Acadia: 22.0 gallons 
It doesn’t matter what engine or trim configuration your GMC Acadia has—the only factors affecting its gas tank size are the model year and drivetrain

How to check your GMC Acadia’s gas tank size

Those gas tank sizes are definitely consistent… almost too consistent. Nevertheless, we know them to be true, but you can take some extra measures to check your Acadia’s gas tank size on your own if you have doubts about these seemingly simple numbers.

Check your owner’s manual

Your GMC Acadia owner’s manual is a one-stop shop for the most trustworthy specs behind your SUV! If you’ve misplaced your owner’s manual (or just don’t feel like digging through the glove box), you can look up your specific Acadia manual

Measure the gas tank

There’s nothing like an applied mathematics problem to double-check your internet finds! Just get under your Acadia with a measuring tape to grab the width, height, and length measurements of the physical gas tank in inches. Multiply these values together, then divide by 231 to convert your calculation from cubic inches to gallons. 
Your gas tank isn’t a perfect rectangular prism, so your calculations won’t be perfect either, but they should give you a very close estimate of your GMC Acadia’s gas tank size.

Drive till empty, then fill it up

Want to live on the wild side of life? Throw your measuring tape out the (metaphorical) window and drive your GMC Acadia down to Empty—just make sure you’re close to a gas station. Once you’re riding on fumes, fill your tank up and check how much gas you used at the pumps to get a rough estimate of your Acadia’s gas tank size.
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How to save on fuel costs in a GMC Acadia

A 2022 GMC Acadia gets 19 to 22 mpg in the city and 26 to 29 mpg on the highway—that’s not bad for a full-size crossover! Older models saw slightly lower efficiency with 15 to 22 city mpg and 21 to 26 highway mpg depending on the trims and drivetrains, and those ratings have likely depleted from the years of natural wear and tear.
With such a large gas tank volume, you probably want to stretch your GMC Acadia’s fuel economy ratings to the max! Here are some ways to maximize your Acadia’s efficiency:
  • Stick to a
    basic car maintenance schedule
    to reduce wear and tear and keep your Acadia’s engine running as smoothly—and efficiently—as possible!
  • Practice mindful driving by accelerating gradually. Driving with a lead foot is an express pass to the gas station.
  • Don’t idle your carin the cold—or any climate! Use your car as soon as the engine is on to avoid eating up gas for no reason. You can always start off by driving slowly if you’re worried about warming up your engine in the winter.

How to optimize your Acadia’s insurance coverage

You can optimize your GMC Acadia’s fuel efficiency with these easy tips, but what about your other car expenses? We may not be able to help with repairs or depreciation, but we know some
licensed insurance brokers
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