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  • Onyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLT

    $37,704

    73,396 mi.
    Est. $710/mo

    Gurnee Chrysler Jeep Dodge Ram

    3.0
    Gurnee, IL (40 mi)
    Check Availability

  • Summit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLT

    $32,237

    $828
    133,756 mi.
    Est. $607/mo

    Max Ford Chrysler Dodge Jeep RAM of Nevada

    4.9
    Nevada, MO (452 mi)
    Check Availability
  • Summit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLT

    $35,955

    $491
    91,011 mi.
    Est. $677/mo

    D-Patrick Nissan

    4.9
    Evansville, IN (270 mi)
    Check Availability
  • Brown 2015 GMC Sierra 3500 SLTBrown 2015 GMC Sierra 3500 SLTBrown 2015 GMC Sierra 3500 SLTBrown 2015 GMC Sierra 3500 SLTBrown 2015 GMC Sierra 3500 SLTBrown 2015 GMC Sierra 3500 SLT

    $31,900

    78,167 mi.
    Est. $601/mo

    A Car 4 You LLC- Brick

    3.8
    Brick Township, NJ (715 mi)
    Check Availability
  • Summit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLT

    $32,995

    $2K
    65,509 mi.
    Est. $622/mo

    The Internet Car Lot

    3.6
    Lincoln, NE (475 mi)
    Check Availability
  • Bronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLT

    $44,685

    71,415 mi.
    Est. $842/mo

    Berkenkotter Motors Parker

    4.7
    Parker, CO (911 mi)
    Check Availability
  • Bronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLTBronze Alloy Metallic 2015 GMC Sierra 3500 SLT

    $27,199

    173,140 mi.
    Est. $512/mo

    Speck Buick GMC

    3.6
    Pasco, WA (1,586 mi)
    Check Availability
  • Onyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLT

    $37,704

    73,396 mi.
    Est. $710/mo

    Gurnee Chrysler Jeep Dodge Ram

    3.0
    Gurnee, IL (40 mi)
    Check Availability
  • Onyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLTOnyx Black 2015 GMC Sierra 3500 SLT

    $31,790

    148,375 mi.
    Est. $599/mo

    KT Automall

    3.3
    Paterson, NJ (702 mi)
    Check Availability
  • White 2015 GMC Sierra 3500 SLTWhite 2015 GMC Sierra 3500 SLTWhite 2015 GMC Sierra 3500 SLTWhite 2015 GMC Sierra 3500 SLTWhite 2015 GMC Sierra 3500 SLTWhite 2015 GMC Sierra 3500 SLT

    $26,999

    150,259 mi.
    Est. $509/mo

    Marty's Auto Sales

    3.1
    Savage, MN (351 mi)
    Check Availability
  • Summit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLTSummit White 2015 GMC Sierra 3500 SLT

    $30,119

    176,556 mi.
    Est. $567/mo

    Devils Lake Ford

    4.9
    Devils Lake, ND (697 mi)
    Check Availability
  • Blue Metallic 2015 GMC Sierra 3500 SLTBlue Metallic 2015 GMC Sierra 3500 SLTBlue Metallic 2015 GMC Sierra 3500 SLTBlue Metallic 2015 GMC Sierra 3500 SLTBlue Metallic 2015 GMC Sierra 3500 SLTBlue Metallic 2015 GMC Sierra 3500 SLT

    $35,950

    113,640 mi.
    Est. $677/mo

    High Desert Auto Wholesale

    ALBUQUERQUE, NM (1,124 mi)
    Check Availability
  • Cobalt Blue Metallic 2015 GMC Sierra 3500 SLTCobalt Blue Metallic 2015 GMC Sierra 3500 SLT

    $39,098

    70,469 mi.
    Est. $737/mo

    Holm Automotive Center

    4.9
    Abilene, KS (543 mi)
    Check Availability
  • $34,975

    126,180 mi.
    Est. $659/mo

    Clare Auto Sales

    Clare, MI (198 mi)
    Check Availability

GMC Sierra 3500 prices by year

Model year Average price Deals
2026 GMC Sierra 3500 SLT 4 Good deals
2025 GMC Sierra 3500 SLT $65,204 12 Great deals
2024 GMC Sierra 3500 SLT $59,142 10 Great deals

About the 2015 GMC Sierra 3500 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 3500 SLT
FAQs

How much does the 2015 GMC Sierra 3500 SLT cost?

The 2015 GMC Sierra 3500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2015 Sierra 3500 SLT is $33,970, with pricing starting at $26,999.

What are some similar vehicles and competitors of the 2015 GMC Sierra 3500 SLT?

The 2015 GMC Sierra 3500 SLT compares to and/or competes against the following vehicles:


Is the 2015 GMC Sierra 3500 SLT reliable?

The 2015 GMC Sierra 3500 has an average reliability rating of 4.6 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2015 Sierra 3500 owners.

Ratings (13 reviews)

92% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.6
Interior
4.8
Performance
4.7
Value
4.5
Exterior
4.7
Reliability
4.6
Trims

SLT (12 styles)

Style
4WD Crew Cab 167.7" SLT 2WD Crew Cab 167.7" SLT 2WD Crew Cab 167.7" SLT 4WD Crew Cab 153.7" SLT 2WD Crew Cab 153.7" SLT 2WD Crew Cab 153.7" SLT 4WD Crew Cab 167.7" SLT 4WD Crew Cab 153.7" SLT 4WD Double Cab 158.1" SLT 4WD Double Cab 158.1" SLT 2WD Double Cab 158.1" SLT 2WD Double Cab 158.1" SLT
Inventory price
Starting at $49,935 Starting at $49,380 Starting at $46,810 Starting at $52,310 Starting at $49,185 Starting at $46,615 Starting at $52,505 Starting at $49,740 Starting at $48,155 Starting at $50,725 Starting at $45,005 Starting at $47,575
Combined MPG
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)