1,236 Used GMC Sierra for Sale Near Longmont, CO

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2016 GMC Sierra 4WD Crew Cab Long Box Denali's photo
VerifiedDealer partner

2016 GMC Sierra

4WD Crew Cab Long Box Denali•124,291 mi•
1GT42YE81GF261508
$39,988
LocationDenver, CO•Family Trucks And Vans
2022 GMC Sierra 4WD Crew Cab Std Box Elevation 3VL's photo
VerifiedDealer partner

2022 GMC Sierra

4WD Crew Cab Std Box Elevation 3VL•68,111 mi•
3GTPUJEK3NG591737
$34,634
LocationColorado Springs, CO•Green Light Auto Sales
2014 GMC Sierra 4WD Crew Cab Standard Box SRW's photo

2014 GMC Sierra

4WD Crew Cab Standard Box SRW•163,237 mi•
1GT426C85EF155549
$34,988
LocationDenver, CO•Family Trucks And Vans
2025 GMC Sierra AT4 4WD Crew Cab Short Box's photo
New listing

2025 GMC Sierra

AT4 4WD Crew Cab Short Box•20,201 mi•
1GTUUEE83SZ214254
$54,997
LocationCastle Rock, CO•Castle Rock Chevrolet Gmc
2026 GMC Sierra Denali Ultimate 4WD Crew Cab Short Box's photo
New listing

2026 GMC Sierra

Denali Ultimate 4WD Crew Cab Short Box•6,671 mi•
1GTUUHEL6TZ199966
$68,497
LocationCastle Rock, CO•Castle Rock Chevrolet Gmc
2026 GMC Sierra 4WD Crew Cab Standard Box AT4's photo
New listing

2026 GMC Sierra

4WD Crew Cab Standard Box AT4•9,443 mi•
1GT4UPEY0TF200973
$73,998
LocationGrand Junction, CO•Red Rock Nissan
2018 GMC Sierra SLE 4x4 Crew Cab Standard Box's photo
New listing

2018 GMC Sierra

SLE 4x4 Crew Cab Standard Box•189,636 mi•
1GT12SEG5JF193857
$22,500
LocationGreeley, CO•Noco Truck Center
2021 GMC Sierra 4WD Crew Cab Short Box SLT's photo
New listing

2021 GMC Sierra

4WD Crew Cab Short Box SLT•87,801 mi•
3GTU9DED1MG375018
$34,998
LocationCentennial, CO•Autonation Toyota Arapahoe
2021 GMC Sierra 4WD Crew Cab Short Box SLT's photo
New listing

2021 GMC Sierra

4WD Crew Cab Short Box SLT•62,578 mi•
3GTU9DED0MG237714
$37,796
LocationNorthglenn, CO•Autonation Usa Denver 104
2018 GMC Sierra 4WD Crew Cab Short Box's photo
New listing

2018 GMC Sierra

4WD Crew Cab Short Box•136,391 mi•
3GTU2PEJ7JG138282
$30,995
LocationRock Springs, WY•Wyoming Trucks
2024 GMC Sierra 4WD Crew Cab Standard Box AT4's photo
New listing

2024 GMC Sierra

4WD Crew Cab Standard Box AT4•96,854 mi•
1GT49PEY6RF183414
$58,798
LocationLittleton, CO•Autonation Dodge Ram Broadway
2023 GMC Sierra 4WD Crew Cab Short Box Denali's photo
New listing

2023 GMC Sierra

4WD Crew Cab Short Box Denali•79,932 mi•
3GTUUGE80PG277671
$48,424
LocationColorado Springs, CO•Alpine Buick Gmc South
2026 GMC Sierra AT4X 4WD Crew Cab Standard Box's photo
New listing

2026 GMC Sierra

AT4X 4WD Crew Cab Standard Box•9,082 mi•
1GT4UZEY4TF112259
$81,997
LocationCastle Rock, CO•Castle Rock Chevrolet Gmc
2021 GMC Sierra 4WD Crew Cab Short Box Denali's photo
New listing

2021 GMC Sierra

4WD Crew Cab Short Box Denali•25,463 mi•
3GTU9FEL1MG309717
$47,793
LocationColorado Springs, CO•Springs Automotive Group Platte Ave
2024 GMC Sierra 4WD Crew Cab Short Box AT4's photo
New listing

2024 GMC Sierra

4WD Crew Cab Short Box AT4•48,112 mi•
1GTUUEE87RZ314576
$50,793
LocationColorado Springs, CO•Springs Automotive Group Platte Ave
2023 GMC Sierra 4WD Crew Cab Standard Box Elevation's photo
New listing

2023 GMC Sierra

4WD Crew Cab Standard Box Elevation•29,336 mi•
3GTPUCEK2PG250862
$41,488
LocationBrighton, CO•Johnson Auto Plaza
2018 GMC Sierra 4WD Crew Cab Long Box's photo

2018 GMC Sierra

4WD Crew Cab Long Box•130,050 mi•
1GT12REG4JF158672
$25,900
LocationCommerce City, CO•Auto Hub
2025 GMC Sierra 4WD Crew Cab Standard Box SLE's photo

2025 GMC Sierra

4WD Crew Cab Standard Box SLE•92,928 mi•
1GT4UMEY5SF206457
$64,381
LocationLoveland, CO•Loveland Ford
2020 GMC Sierra 4WD Crew Cab Long Box DRW Denali's photo

2020 GMC Sierra

4WD Crew Cab Long Box DRW Denali•104,383 mi•
1GT49WEY1LF248638
$60,280
LocationLoveland, CO•Loveland Ford
2023 GMC Sierra 4WD Crew Cab Standard Box Elevation's photo

2023 GMC Sierra

4WD Crew Cab Standard Box Elevation•118,922 mi•
1GTUUCED3PZ330207
$34,950
LocationEnglewood, CO•Custom Cars West
2024 GMC Sierra 4WD Crew Cab Standard Box SLT's photo

2024 GMC Sierra

4WD Crew Cab Standard Box SLT•81,830 mi•
1GT49NEY1RF386523
$59,587
LocationDenver, CO•Omeara Gmc
2022 GMC Sierra 4WD Double Cab Standard Box SLE's photo

2022 GMC Sierra

4WD Double Cab Standard Box SLE•36,683 mi•
1GTR9BEDXNZ102820
$33,690
LocationDelta, CO•Hellman Chevrolet
2025 GMC Sierra AT4X 4WD Crew Cab Standard Box's photo

2025 GMC Sierra

AT4X 4WD Crew Cab Standard Box•47,698 mi•
1GT4UZEY2SF144352
$75,999
LocationGolden, CO•Autonation Buick Gmc West
2025 GMC Sierra 4WD Crew Cab Standard Bx Denali Ultimate's photo

2025 GMC Sierra

4WD Crew Cab Standard Bx Denali Ultimate•60,114 mi•
1GT4UXEYXSF211381
$73,998
LocationCentennial, CO•Autonation Subaru Arapahoe
2025 GMC Sierra 4WD Crew Cab Standard Box AT4's photo

2025 GMC Sierra

4WD Crew Cab Standard Box AT4•33,819 mi•
1GT4UPEY3SF147054
$72,363
LocationLoveland, CO•Loveland Buick Gmc
2002 GMC Sierra 4WD Crew Cab SWB SLE's photo

2002 GMC Sierra

4WD Crew Cab SWB SLE•216,749 mi•
1GTHK23U12F133325
$11,995
LocationColorado Springs, CO•Right Away Auto Sales
2025 GMC Sierra 4WD Crew Cab Standard Bx Denali Ultimate's photo

2025 GMC Sierra

4WD Crew Cab Standard Bx Denali Ultimate•9,908 mi•
1GT4UXEY8SF181202
$83,900
LocationColorado Springs, CO•Lakeside Auto Brokers
2022 GMC Sierra 4WD Crew Cab Standard Box AT4's photo

2022 GMC Sierra

4WD Crew Cab Standard Box AT4•52,021 mi•
1GT49PEY8NF362175
$59,083
LocationLongmont, CO•Mike Maroone Ford Longmont
2022 GMC Sierra 4WD Crew Cab Standard Box Elevation's photo

2022 GMC Sierra

4WD Crew Cab Standard Box Elevation•57,837 mi•
3GTUUCED0NG543533
$41,093
LocationLongmont, CO•Mike Maroone Ford Longmont
2002 GMC Sierra 4WD Extended Cab 6 1/2-ft SLE's photo

2002 GMC Sierra

4WD Extended Cab 6 1/2-ft SLE•269,098 mi•
1GTEK19V82Z235295
$7,280
LocationLa Junta, CO•Gearhead Inc
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Showing 1 - 28 from 1,236 results

1,236

Sierra for sale in Longmont

$42,981

Median local price

370

Longmont-area dealerships

GMC Sierra overview

Shop 1,236 used GMC Sierra listings for sale, priced from $4,698 to $91,995 across 370 dealerships. The median asking price is $42,981, with an average mileage of 76,267 miles. Inventory spans model years 1986 to 2026 and is strongest for 2021–2025, with 740 listings.

About GMC Sierra

Frequently Asked Questions

How many used GMC Sierra listings are for sale?

There are 1,236 used GMC Sierra listings for sale from 370 dealerships, priced from $4,698 to $91,995.

How much does a used GMC Sierra cost?

The median asking price for a used GMC Sierra is $42,981. Listings range from $4,698 to $91,995. The average mileage is 76,267 miles.

What is the cheapest used GMC Sierra for sale?

The lowest-priced listing is a 1988 GMC Sierra at $4,698 with 137,374 miles in Fort Collins, CO.

What model years are available?

Used GMC Sierra inventory spans model years 1986 to 2026. The 2021–2025 model years are the most available, with 740 listings.

What trim levels are available for the GMC Sierra?

The GMC Sierra is available in the following trim levels:

Used GMC Sierra by trim

Used GMC Sierra in Longmont by year

Used GMC Sierra in nearby metros