Used Gmc Sierra's for sale under $79,991

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2020 GMC Sierra 2500HD AT4 Review

Driven by cheaper fuel prices and a resurgent appetite for all things large, the truck segment is in the midst of a renaissance like never before: they’re bigger, smarter, more capable and increasingly luxurious with jaw dropping price tags. And this one is a real monster – the all-new GMC Sierra Heavy Duty. I’ve driven some big trucks this year including Ram’s new 3500 dually Mega Cab but this one feels even more gargantuan. It’s the Sierra 2500 Heavy Duty; taller and longer than its predecessor and now available in AT4 livery for a little more off-road worthiness. You’ll need the various sidesteps, bumper steps and grab handles for this one because it’s just that large.

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2024 GMC Sierra Bozeman MT

2024 GMC Sierra AT4

4WD - V8, 6.6L

Sterling Metallic

Bozeman, MT

Billion Auto Group

Contact seller

55,103 miles

2022 GMC Sierra Dexter MO

2022 GMC Sierra AT4

4WD - V8, 6.6L

Allen Christian Buick GMC

33,841 miles

2024 GMC Sierra Daytona Beach FL

2024 GMC Sierra AT4

4WD - V8, 6.6L

Daytona Beach, FL

Gary Yeomans Ford Lincoln

Contact seller

44,732 miles

2022 GMC Sierra Athens AL

2022 GMC Sierra AT4

4WD - V8, 6.6L

Jimmy Smith Buick GMC and INFINITI

85,460 miles

2023 GMC Sierra Broussard LA

2023 GMC Sierra AT4

4WD - V8, 6.6L

Broussard, LA

Courtesy Chevrolet Cadillac Broussard

38,855 miles

2024 GMC Sierra Dexter MO

2024 GMC Sierra AT4

4WD - V8, 6.6L

Allen Christian Buick GMC

14,018 miles

2021 GMC Sierra Lafayette LA

2021 GMC Sierra AT4

4WD - V8, 6.6L

Lafayette, LA

Courtesy Buick GMC Lafayette

126,752 miles

2024 GMC Sierra Dexter MO

2024 GMC Sierra AT4

4WD - V8, 6.6L

Allen Christian Buick GMC

65,441 miles

2024 GMC Sierra Athens AL

2024 GMC Sierra AT4

4WD - V8, 6.6L

Thunderstorm Gray

Contact seller

23,063 miles

2024 GMC Sierra Elizabethtown KY

2024 GMC Sierra AT4

4WD - V8, 6.6L

Titanium Rush Metallic

Elizabethtown, KY

Swope Chrysler Dodge Jeep Ram

Contact seller

15,363 miles

2023 GMC Sierra Billings MT

2023 GMC Sierra AT4 DIESEL

4WD - V8, 6.6L

Billings, MT

Denny Menholt Frontier Chevrolet

96,772 miles

2020 GMC Sierra Billings MT

2020 GMC Sierra AT4 DIESEL 4WD

4WD - V8, 6.6L

Billings, MT

Denny Menholt Frontier Chevrolet

72,471 miles

2024 GMC Sierra Broussard LA

2024 GMC Sierra AT4

4WD - V8, 6.6L

Sterling Metallic

Broussard, LA

Courtesy Chevrolet Cadillac Broussard

29,088 miles

2022 GMC Sierra Columbia SC

2022 GMC Sierra Denali

4WD - V8, 6.6L

Hunter Metallic

Columbia, SC

58,012 miles

2023 GMC Sierra Athens AL

2023 GMC Sierra Denali

4WD - V8, 6.6L

Jimmy Smith Buick GMC and INFINITI

59,071 miles

2024 GMC Sierra Union City TN

2024 GMC Sierra Denali

4WD - V8, 6.6L

Volcanic Red Tintcoat

Union City, TN

Herman Jenkins Motors

Contact seller

11,625 miles

2024 GMC Sierra Washington MO

2024 GMC Sierra Denali

4WD - V8, 6.6L

Sterling Metallic

Washington, MO

Schicker Chrysler Dodge Jeep Ram of Washington

33,480 miles

2024 GMC Sierra Sedalia MO

2024 GMC Sierra Denali

4WD - V8, 6.6L

White Frost Tricoat

Sedalia, MO

W-K Chevrolet Buick GMC

35,992 miles

2021 GMC Sierra Blackfoot ID

2021 GMC Sierra Denali

4WD - V8, 6.6L

Cayenne Red Tintcoat

Blackfoot, ID

Tadd Jenkins Ford

Contact seller

92,965 miles

2020 GMC Sierra Tupelo MS

2020 GMC Sierra Denali

4WD - V8, 6.6L

Dossett Big 4 - Buick Cadillac GMC - Honda

Contact seller

102,422 miles

2022 GMC Sierra Dexter MO

2022 GMC Sierra Denali

4WD - V8, 6.6L

White Frost Tricoat

Allen Christian Buick GMC

36,778 miles

2022 GMC Sierra Tupelo MS

2022 GMC Sierra Denali

4WD - V8, 6.6L

White Frost Tricoat

Dossett Big 4 - Buick Cadillac GMC - Honda

Contact seller

43,530 miles

2022 GMC Sierra Hays KS

2022 GMC Sierra SLE

4WD - V8, 6.6L

Lewis Chevrolet of Hays

6,739 miles

2023 GMC Sierra Billings MT

2023 GMC Sierra SLE

4WD - V8, 6.6L

Billings, MT

Contact seller

32,433 miles

Vehicles 2,328 - 3,569

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Used GMC SIERRA