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  • Sonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLT

    $39,402

    35,444 mi.
    Est. $741/mo

    McGrath Acura of Libertyville

    4.4
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    Libertyville, IL (31 mi)

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  • Iridium Metallic 2015 GMC Sierra 2500 SLTIridium Metallic 2015 GMC Sierra 2500 SLTIridium Metallic 2015 GMC Sierra 2500 SLTIridium Metallic 2015 GMC Sierra 2500 SLTIridium Metallic 2015 GMC Sierra 2500 SLTIridium Metallic 2015 GMC Sierra 2500 SLT

    $26,988

    $6.3K
    165,063 mi.
    Est. $507/mo

    Herrin-Gear INFINITI

    4.8
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    Jackson, MS (677 mi)
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  • Quicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLT

    $38,999

    95,241 mi.
    Est. $733/mo

    Fugate Ford

    4.6
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    Enumclaw, WA (1,717 mi)
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  • Quicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLTQuicksilver Metallic 2015 GMC Sierra 2500 SLT

    $25,995

    184,855 mi.
    Est. $489/mo

    MARKETPLACE CHEVROLET

    4.2
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    Stonewall, LA (744 mi)
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  • Fire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLT

    $31,040

    141,000 mi.
    Est. $583/mo

    Austin Chrysler Dodge Jeep RAM

    4.5
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    Austin, MN (300 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $31,889

    $106
    111,607 mi.
    Est. $599/mo

    Serpentini Chevrolet Orrville

    3.8
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    Orrville, OH (313 mi)
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  • 2015 GMC Sierra 2500 SLT2015 GMC Sierra 2500 SLT2015 GMC Sierra 2500 SLT2015 GMC Sierra 2500 SLT2015 GMC Sierra 2500 SLT2015 GMC Sierra 2500 SLT

    $33,999

    $174
    78,806 mi.
    Est. $639/mo

    McGonigal Buick, Cadillac

    3.9
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    Kokomo, IN (126 mi)
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  • Onyx Black 2015 GMC Sierra 2500 SLTOnyx Black 2015 GMC Sierra 2500 SLTOnyx Black 2015 GMC Sierra 2500 SLTOnyx Black 2015 GMC Sierra 2500 SLTOnyx Black 2015 GMC Sierra 2500 SLTOnyx Black 2015 GMC Sierra 2500 SLT

    $31,348

    $754
    124,155 mi.
    Est. $589/mo

    Bergstrom GMC Buick of Appleton

    4.8
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    Appleton, WI (170 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $26,868

    171,241 mi.
    Est. $505/mo

    Joe Rizza Ford Lincoln

    4.2
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    Orland Park, IL (22 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $39,700

    $2K
    74,977 mi.
    Est. $746/mo

    Marty's GMC

    4.7
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    Kingston, MA (869 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $24,999

    $3.1K
    121,647 mi.
    Est. $470/mo

    Stewart Automotive Group

    2.8
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    Alliance, OH (344 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $19,873

    293,655 mi.
    Est. $374/mo

    Bluff Street Auto Brokers

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    St George, UT (1,417 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $26,996

    149,750 mi.
    Est. $507/mo

    Arya Motors

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    Fredericksburg, VA (592 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $25,943

    169,823 mi.
    Est. $488/mo

    VanDevere Chevrolet

    3.9
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    Akron, OH (319 mi)
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  • Fire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLTFire Red 2015 GMC Sierra 2500 SLT

    $28,995

    115,385 mi.
    Est. $545/mo

    Lot 99

    1.1
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    Milwaukie, OR (1,752 mi)
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  • Black 2015 GMC Sierra 2500 SLTBlack 2015 GMC Sierra 2500 SLTBlack 2015 GMC Sierra 2500 SLTBlack 2015 GMC Sierra 2500 SLTBlack 2015 GMC Sierra 2500 SLT

    $22,000

    273,870 mi.
    Est. $414/mo

    Baba's Motorsports LLC

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    Phoenix, AZ (1,447 mi)
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  • Summit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLTSummit White 2015 GMC Sierra 2500 SLT

    $41,995

    103,617 mi.
    Est. $789/mo

    Secured Auto Group

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    Salt Lake City, UT (1,258 mi)
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  • Silver 2015 GMC Sierra 2500 SLTSilver 2015 GMC Sierra 2500 SLTSilver 2015 GMC Sierra 2500 SLTSilver 2015 GMC Sierra 2500 SLTSilver 2015 GMC Sierra 2500 SLTSilver 2015 GMC Sierra 2500 SLT

    $17,200

    115,700 mi.
    Est. $323/mo

    Private seller: Chris

    Contact Seller
    Bloomington, IA (306 mi)
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  • White 2015 GMC Sierra 2500 SLTWhite 2015 GMC Sierra 2500 SLTWhite 2015 GMC Sierra 2500 SLTWhite 2015 GMC Sierra 2500 SLTWhite 2015 GMC Sierra 2500 SLTWhite 2015 GMC Sierra 2500 SLT

    $29,995

    43,133 mi.
    Est. $564/mo

    Nelson Automotive

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    Polk City, IA (314 mi)
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  • Sonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLTSonoma Red Metallic 2015 GMC Sierra 2500 SLT

    $25,995

    $500
    98,645 mi.
    Est. $489/mo

    Bell Mitsubishi

    4.7
    Check Availability
    Rahway, NJ (700 mi)
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  • Gray 2015 GMC Sierra 2500 SLTGray 2015 GMC Sierra 2500 SLT

    $26,995

    342,562 mi.
    Est. $507/mo

    American Direct Auto

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    Winnsboro, LA (708 mi)
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  • RED 2015 GMC Sierra 2500 SLT

    Not Priced

    158,859 mi.
    Est. $0/mo

    Valders Vehicles

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    Hinckley, MN (388 mi)
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  • Not Priced

    204,975 mi.

    Everett Infiniti of Northwest Arkansas

    Check Availability
    Rogers, AR (521 mi)
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  • $23,510

    236,232 mi.
    Est. $442/mo

    Escude Chevrolet

    3.5
    Check Availability
    Easley, SC (562 mi)
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GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 SLT 2 Good deals
2025 GMC Sierra 2500 SLT $68,068 23 Great deals
2024 GMC Sierra 2500 SLT $62,430 28 Great deals
2023 GMC Sierra 2500 SLT $54,412 24 Good deals
2022 GMC Sierra 2500 SLT $49,177 8 Great deals
2021 GMC Sierra 2500 SLT $47,959 9 Great deals
2020 GMC Sierra 2500 SLT $45,231 11 Great deals
2018 GMC Sierra 2500 SLT $38,877 8 Great deals
2017 GMC Sierra 2500 SLT $34,982 5 Great deals

About the 2015 GMC Sierra 2500 SLT

Basics

SLT shown.

Seating
5
Door count
4
Drivetrain
Rear Wheel Drive
Combined MPG
0
Transmission
6-Speed A/T
Engine
360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability)
Side view of the 2015 GMC Sierra 2500 SLT
FAQs

How much does the 2015 GMC Sierra 2500 SLT cost?

The 2015 GMC Sierra 2500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2015 Sierra 2500 SLT is $29,292, with pricing starting at $17,200.

What are some similar vehicles and competitors of the 2015 GMC Sierra 2500 SLT?

The 2015 GMC Sierra 2500 SLT compares to and/or competes against the following vehicles:


Is the 2015 GMC Sierra 2500 SLT reliable?

The 2015 GMC Sierra 2500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2015 Sierra 2500 owners.

Ratings (40 reviews)

92% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.8
Interior
4.8
Performance
4.8
Value
4.6
Exterior
4.9
Reliability
4.7
Trims

SLT (16 styles)

Style
4WD Double Cab 144.2" SLT 4WD Double Cab 158.1" SLT 2WD Double Cab 158.1" SLT 4WD Double Cab 158.1" SLT 2WD Double Cab 144.2" SLT 2WD Double Cab 144.2" SLT 2WD Double Cab 158.1" SLT 4WD Double Cab 144.2" SLT 4WD Crew Cab 167.7" SLT 2WD Crew Cab 167.7" SLT 4WD Crew Cab 167.7" SLT 2WD Crew Cab 153.7" SLT 4WD Crew Cab 153.7" SLT 4WD Crew Cab 153.7" SLT 2WD Crew Cab 167.7" SLT 2WD Crew Cab 153.7" SLT
Inventory price
Starting at $46,705 Starting at $46,900 Starting at $43,750 Starting at $49,295 Starting at $45,950 Starting at $43,555 Starting at $46,145 Starting at $49,100 Starting at $51,415 Starting at $45,895 Starting at $49,020 Starting at $48,100 Starting at $51,220 Starting at $48,825 Starting at $48,290 Starting at $45,705
Combined MPG
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Engine
360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability) 360.0-hp, 6.0-liter, 8 Cylinder Engine (Flex Fuel Capability)
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GMC Sierra 2500 trims