Laura Buick GMC, Inc.

Clement Supercenter

Dave Sinclair Buick GMC

Lou Fusz Buick GMC

Mountain Top Motor Co

O'Fallon Buick GMC

Private Seller Exchange

Mylenbusch Auto Source

AutoCenters Nissan

Behlmann Buick GMC

AutoNation USA St. Louis

Clement Pre-Owned (Florissant)

Spider

Fullsize Regular Cab

Truck

AWD4WD

8-Cylinder

Gasoline

Sierra 2500

Gooseneck/5th Wheel Prep Package

SLE Convenience Package

X31 Off-Road Package

Remote Start Package

SLE Heated Package

New 2025 GMC Sierra 2500 SLE

New 2025 GMC Sierra 2500 SLE O Fallon MO 63368

Automatic

Compact Crew Cab

4-Cylinder Turbo

Canyon

Nightfall Edition

Technology Plus Package

AT4 Premium Package

New 2025 GMC Canyon AT4 w/ Nightfall Edition

New 2025 GMC Canyon AT4 w/ Nightfall Edition O Fallon MO 63368

Fullsize

Sport Utility

Yukon XL

LPO, Get Active Package

LPO, Floor Liner Package

New 2025 GMC Yukon XL Elevation w/ LPO, Get Active Package

New 2025 GMC Yukon XL Elevation w/ LPO, Get Active Package O Fallon MO 63368

Elevation

Acadia

New 2025 GMC Acadia Elevation w/ LPO, Floor Liner Package

New 2025 GMC Acadia Elevation w/ LPO, Floor Liner Package O Fallon MO 63368

Fullsize Crew Cab

8-Cylinder Turbo

Diesel

Used

Max Trailering Package

Heavy Duty Front Spring/Camper Package

Get AutoCheck Vehicle History

Used 2024 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package

Used 2024 GMC Sierra 2500 Denali Ultimate w/ Max Trailering Package Saint Peters MO 63376

Denali Ultimate

Denali Reserve Package

New 2025 GMC Sierra 2500 Denali w/ Denali Reserve Package

New 2025 GMC Sierra 2500 Denali w/ Denali Reserve Package O Fallon MO 63368

Denali

AT4 Premium Plus Package

Snow Plow Prep/Camper Package

New 2025 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package

New 2025 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package Collinsville IL 62234

Convenience Package

Preferred Package

New 2025 GMC Canyon Elevation w/ Convenience Package

New 2025 GMC Canyon Elevation w/ Convenience Package O Fallon MO 63368

New 2025 GMC Acadia Elevation

New 2025 GMC Acadia Elevation O Fallon MO 63368

Super Cruise Package

New 2025 GMC Acadia Denali w/ Super Cruise Package

New 2025 GMC Acadia Denali w/ Super Cruise Package O Fallon MO 63368

Denali Ultimate Package

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2021 GMC Sierra 2500 Denali w/ Denali Ultimate Package Herculaneum MO 63048

X31 Off-Road and Protection Package

SLT Convenience Package

Used 2024 GMC Sierra 2500 SLT

Used 2024 GMC Sierra 2500 SLT Troy MO 63379

Used 2020 GMC Sierra 2500 HD Crew Cab AT4 Pickup 4D 6 1/2 ft

Technology Package

AT4 Preferred Package

Driver Alert Package I

Gooseneck/5TH Wheel Package

Driver Alert Package II

Used 2020 GMC Sierra 2500 AT4 w/ Technology Package

Used 2020 GMC Sierra 2500 AT4 w/ Technology Package Saint Louis MO 63141

Used 2024 GMC Sierra 2500 AT4 w/ AT4 Preferred Package

Used 2024 GMC Sierra 2500 AT4 w/ AT4 Preferred Package St. Charles MO 63303

New 2025 GMC Sierra 2500 Denali w/ Denali Reserve Package Collinsville IL 62234

Certified

Certified 2023 GMC Sierra 2500 AT4 w/ Driver Alert Package I

Certified 2023 GMC Sierra 2500 AT4 w/ Driver Alert Package I Collinsville IL 62234

Certified 2023 GMC Sierra 2500 SLE

Certified 2023 GMC Sierra 2500 SLE Collinsville IL 62234

New 2025 GMC Sierra 2500 SLT

New 2025 GMC Sierra 2500 SLT Collinsville IL 62234

Denali Premium Package

LPO, All-Weather Floor Liner Package

Used 2020 GMC Yukon XL Denali w/ Denali Premium Package

Used 2020 GMC Yukon XL Denali w/ Denali Premium Package O Fallon MO 63368

Used 2023 GMC Sierra 2500 SLT w/ SLT Convenience Package

Used 2023 GMC Sierra 2500 SLT w/ SLT Convenience Package St. Charles MO 63303

Used 2024 GMC Canyon Denali

Used 2024 GMC Canyon Denali O Fallon MO 63368

SLE Value Package;

New 2025 GMC Sierra 2500 SLE w/ SLE Value Package;

New 2025 GMC Sierra 2500 SLE w/ SLE Value Package; Highland IL 62249

LPO, Hitch Package

Certified 2024 GMC Sierra 2500 Denali Ultimate

Certified 2024 GMC Sierra 2500 Denali Ultimate Collinsville IL 62234

Flexible Fuel

Used 2017 GMC Sierra 2500 2WD Regular Cab

Used 2017 GMC Sierra 2500 2WD Regular Cab O'fallon MO 63366

2WD Regular Cab

Used 2022 GMC Sierra 2500 Denali

Used 2022 GMC Sierra 2500 Denali Florissant MO 63033

Suspension Package, Off-Road

Used 2014 GMC Sierra 2500 Denali w/ Suspension Package, Off-Road

Used 2014 GMC Sierra 2500 Denali w/ Suspension Package, Off-Road Troy MO 63379

Duramax Plus Package

Gooseneck/5TH Wheel Prep Package

Used 2019 GMC Sierra 2500 Denali w/ Duramax Plus Package

Used 2019 GMC Sierra 2500 Denali w/ Duramax Plus Package Saint Louis MO 63123

Used 2023 GMC Sierra 2500 Denali w/ Technology Package

Used 2023 GMC Sierra 2500 Denali w/ Technology Package O Fallon MO 63368

Certified 2024 GMC Sierra 2500 Pro w/ Convenience Package

Certified 2024 GMC Sierra 2500 Pro w/ Convenience Package Collinsville IL 62234

Certified 2023 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package

Certified 2023 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package Collinsville IL 62234

LPO, GMC Protection Package

Used 2020 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2020 GMC Sierra 2500 Denali w/ Denali Ultimate Package Collinsville IL 62234

Used 2023 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2023 GMC Sierra 2500 Denali w/ Denali Ultimate Package Saint Louis MO 63132

AT4X AEV Edition

New 2025 GMC Sierra 2500 AT4X w/ AT4X AEV Edition

New 2025 GMC Sierra 2500 AT4X w/ AT4X AEV Edition Collinsville IL 62234

AT4X

Used 2022 GMC Sierra 2500 AT4

Used 2022 GMC Sierra 2500 AT4 Collinsville IL 62234

Used 2015 GMC Sierra 2500 Denali w/ Duramax Plus Package

Used 2015 GMC Sierra 2500 Denali w/ Duramax Plus Package Collinsville IL 62234

Used 2024 GMC Sierra 2500 HD Crew Cab Denali Pickup 4D 6 1/2 ft

Used 2024 GMC Sierra 2500 Denali w/ Technology Package

Used 2024 GMC Sierra 2500 Denali w/ Technology Package Jerseyville IL 62052

Used 2022 GMC Sierra 2500 SLE w/ SLE Convenience Package

Used 2022 GMC Sierra 2500 SLE w/ SLE Convenience Package Collinsville IL 62234

Used 2023 GMC Sierra 2500 SLE w/ SLE Value Package;

Used 2023 GMC Sierra 2500 SLE w/ SLE Value Package; Collinsville IL 62234

Used 2022 GMC Sierra 2500 Denali w/ Denali Ultimate Package

Used 2022 GMC Sierra 2500 Denali w/ Denali Ultimate Package Collinsville IL 62234

Used 2020 GMC Sierra 2500 4x4 Crew Cab w/ Convenience Package

Used 2020 GMC Sierra 2500 4x4 Crew Cab w/ Convenience Package Collinsville IL 62234

4x4 Crew Cab

LAURA BUICK GMC

Steve Schmitt, Inc.

St Louis

Cars for Sale

Shop, watch video walkarounds and compare prices on GMC Sierra 2500 listings in O'fallon, MO. See Kelley Blue Book pricing to get the best deal. Search from 529 GMC Sierra 2500 cars for sale, including a Certified 2023 GMC Sierra 2500 AT4, a Certified 2023 GMC Sierra 2500 SLE, and a Certified 2024 GMC Sierra 2500 Denali Ultimate ranging in price from $10,500 to $105,815.

GMC Sierra 2500 for Sale in O'fallon, MO - Kelley Blue Book

Search from 529 GMC Sierra 2500 for sale, including a Certified 2023 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package, a Certified 2023 GMC Sierra 2500 AT4 w/ Driver Alert Package I, and a Certified 2023 GMC Sierra 2500 SLE ranging in price from $10,500 to $105,815.

Autotrader has 529 GMC Sierra 2500 for sale near O'fallon, MO, including a Certified 2023 GMC Sierra 2500 AT4 w/ AT4 Premium Plus Package, a Certified 2023 GMC Sierra 2500 AT4 w/ Driver Alert Package I, and a Certified 2023 GMC Sierra 2500 SLE ranging in price from $10,500 to $105,815.

Frankie Rogers is a senior editor for Kelley Blue Book and focuses on the production of content. She edits and formats content, creates monthly deals lists, is a media asset curator, and photographs cars for various articles and inclusion in KBB’s image library. Her 16+ years at Kelley Blue Book have included roles as a Blue Book copy editor, press vehicle wrangler, and VIN analyst. In her spare time, she can be found tinkering with her 1970 Chevrolet Camaro, trying out new recipes in her cast iron pans, and spoiling her two cats, Grayson and Thaddeus.

Frankie Rogers

Colin Ryan, Author at Kelley Blue Book

Scott Hinderer is an award-winning copy editor. Before joining Cox Automotive in 2022, he built a 15-year career in print and digital journalism. His diverse résumé brings a broad perspective and commitment to accuracy to Autotrader and Kelley Blue Book that enrich the reader experience. Scott has a Bachelor of Arts in English from Salisbury University.

Scott Hinderer

Russ Heaps has produced automotive content for newspapers, magazines, and websites since 1987. Knight-Ridder recognized his contributions in founding and supplying content for the stand-alone auto section in the Boca Raton News with a Knight-Ridder Excellence award nomination in 1990. He began contributing advice and other automotive-related content to Cox Automotive as a contractor in 2010. Cox Automotive brought Russ on board as Senior Editor, Advice for Kelley Blue Book in 2022. Previously, he contributed financial and automotive content for Bankrate.com. He was also managing editor for Auto World and NOPI Street Performance Compact magazines for four years. His work has appeared in the Washington Times, the Miami Herald, the Palm Beach Post, and a host of other newspapers on a syndicated basis. 
Russ also has a deep background in travel as the supervising producer for the syndicated television series Discover America where he also wrote scripts and field-produced episodes. Additionally, he authored travel stories for AAA of the Carolinas Magazine.
He graduated Wittenberg University with a degree in Political Science. His passions are friends, cars, bourbon, and the Pittsburgh Steelers.

Russ Heaps

Midsize SUV Crossover

Midsize SUV Crossover Articles - Kelley Blue Book

2025Mitsubishi Outlander

2025Mitsubishi Outlander Archives - Kelley Blue Book

suv Archives - Kelley Blue Book

$28,500 - $33,499

$28,500 - $33,499 Archives - Kelley Blue Book

$33,500 - $38,499

$33,500 - $38,499 Archives - Kelley Blue Book

$38,500 - $43,499

$38,500 - $43,499 Archives - Kelley Blue Book

$43,500 - $48,499

$43,500 - $48,499 Archives - Kelley Blue Book

2-Line Blurb

140-Character Blurb

The Mitsubishi Outlander is America’s most affordable 3-row SUV, and its great warranty and impressive fuel economy add to its value proposition.

Cons

<ul>
<li>Weak engine</li>
<li>Tiny third row</li>
<li>Poor resale value</li>
</ul>

Power, Ride, and Handling

Driving Impressions

The 2025 Mitsubishi Outlander is powered by a 181-horsepower 4-cylinder engine matched with a continuously variable automatic transmission (CVT)and front-wheel drive (FWD) or all-wheel drive (AWD). On paper, its performance is about on par with the base engine of the Kia Sorento, but a much stronger turbo engine is optional in the Sorento and standard in the Hyundai Santa Fe.
Although the middling horsepower, less-than-responsive transmission, and light steering make the Outlander a bit anemic, we were pleasantly surprised by the ride quality’s refinement in our testing. A plush suspension and muted cabin noise almost made us forget that the Outlander is one of the cheapest cars in its class.
<h3>Fuel Economy</h3>
The 2025 Mitsubishi Outlander returns 27 combined mpg with front-wheel drive and 26 mpg with all-wheel drive. These ratings are slightly better than the base engines in the Kia Sorento and Hyundai Santa Fe, but both of those rivals have conventional hybrid options that get up to 36 combined mpg. Meanwhile, the Outlander PHEV goes up to 38 miles on electricity alone and returns 26 mpg with a depleted battery.

Handsome Exterior

Exterior

The current Outlander SUV has more presence and attitude than its predecessor. In the past, that third row might have been the main reason for choosing an Outlander. Nowadays, the design might also have some sway. Some slight styling tweaks for 2025 help to keep it fresh.

FAQs

Our Favorite Features and Tech

Favorite Features

All-wheel drive 
Mitsubishi calls it Super All-Wheel Control (S-AWC), but most of us tend to know it as all-wheel drive, providing the usual extra confidence during bad weather. It has selectable modes of Tarmac, Gravel, Snow, Normal, Eco, and Mud. The difference between Tarmac and Normal is that the former is like a Sport setting.
Apple CarPlay/Android Auto 
We all expect phone integration to be standard in new vehicles these days. It is in the 2025 Outlander, and it works wirelessly in every trim.
Standard Yamaha audio 
Premium sound is usually reserved for upper trims, but in 2025, every Outlander comes with a Yamaha audio system. The base ES trim has an 8-speaker setup, while every other trim has a more powerful 12-speaker system.
Powered tailgate 
A power-operated tailgate (with adjustable opening heights) is simply a great convenience feature, which becomes standard in the SE.
12.3-inch digital instrument cluster 
This configurable driver information display becomes available in the SE’s Tech package. It can show the usual things like road and engine speeds, plus navigation directions.
Head-up display 
Taking driver-oriented tech further, the head-up display projects information into the windshield, reducing those fractions of seconds spent not looking at the road. This is part of the SEL’s Touring package.

3-Row Interior

Interior

We’re pleased to report that the Outlander 3-row SUV’s interior is uncluttered and made of high-quality materials. Pricier versions can be almost luxurious, offering semi-aniline leather with diamond-patterned stitching for the seats and door panels.
The good news for families who can benefit from extra seats is that the Mitsubishi Outlander has standard 3-row seating for up to seven. The bad news is that the third row is tiny, fit exclusively for children and the vertically challenged. There are only 18.7 inches of third-row legroom, considerably less than the Kia Sorento and Hyundai Santa Fe, which have about 30 inches of legroom in the way back.
However, if you’ll have the third row folded down most of the time, the Outlander has a decent-sized cargo hold with 30.6 cubic feet of room. There’s 10.9 cubic feet of room behind the third row and a whopping 64.3 cubic feet when all rear seats are folded down. Again, its closest rivals from Kia and Hyundai have more cargo room by virtue of being larger vehicles.

GMC Sierra 2500 for Sale in O'fallon, MO

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New 2025 GMC Sierra 2500 Denali w/ Denali Reserve Package

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