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  • Onyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLT

    $67,438

    $1K
    Est. $1,261/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)

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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $71,750

    MSRP $77,750

    Est. $1,342/mo

    Suntrup Buick GMC

    3.9
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    Saint Peters, MO (16 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $78,495

    Est. $1,468/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $67,591

    MSRP $75,375

    Est. $1,264/mo

    Dave Sinclair Buick GMC

    4.9
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    Saint Louis, MO (17 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $73,995

    Est. $1,384/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Titanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLT

    $73,995

    $1K
    Est. $1,384/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $79,495

    Est. $1,486/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $78,995

    $456
    Est. $1,477/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Titanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLTTitanium Rush Metallic 2026 GMC Sierra 3500 SLT

    $80,903

    Est. $1,513/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Glacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLT

    $78,995

    $500
    Est. $1,477/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Onyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLT

    $74,995

    Est. $1,402/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $79,331

    $3K
    Est. $1,483/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Volcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLT

    $79,995

    Est. $1,496/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Glacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLTGlacier White 2026 GMC Sierra 3500 SLT

    $80,333

    Est. $1,502/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (17 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $82,515

    MSRP $88,515

    Est. $1,543/mo

    Suntrup Buick GMC

    3.9
    Check Availability
    Saint Peters, MO (16 mi)
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  • Volcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLTVolcanic Red 2026 GMC Sierra 3500 SLT

    $73,095

    MSRP $79,095

    Est. $1,367/mo

    Suntrup Buick GMC

    3.9
    Check Availability
    Saint Peters, MO (16 mi)
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  • Onyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLTOnyx Black 2026 GMC Sierra 3500 SLT

    $71,500

    MSRP $79,820

    Est. $1,337/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    $299 delivery from Naperville, IL (237 mi)
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  • Summit White 2026 GMC Sierra 3500 SLT

    $76,615

    MSRP $77,615

    Est. $1,433/mo

    Woody Buick GMC of Gurnee

    5.0
    Check Availability
    $419 delivery from Gurnee, IL (280 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $79,803

    Est. $1,492/mo

    Laura Chevrolet Buick GMC of Sullivan, LLC

    4.8
    Check Availability
    Sullivan, MO (56 mi)
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  • Summit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLTSummit White 2026 GMC Sierra 3500 SLT

    $78,820

    Est. $1,474/mo

    Poage Auto Plaza, Inc.

    Check Availability
    Quincy, IL (100 mi)
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  • Summit White 2026 GMC Sierra 3500 SLT

    $81,810

    $4K

    MSRP $86,810

    Est. $1,530/mo

    Lighthouse Buick GMC

    5.0
    Check Availability
    Morton, IL (137 mi)
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About the 2026 GMC Sierra 3500 SLT

Basics

SLT shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
0
Transmission
10-Speed A/T
Engine
470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2026 GMC Sierra 3500 SLT
FAQs

How much does the 2026 GMC Sierra 3500 SLT cost?

The 2026 GMC Sierra 3500 SLT price depends on optional features. Prices typically start at $66,400.

What are some similar vehicles and competitors of the 2026 GMC Sierra 3500 SLT?

The 2026 GMC Sierra 3500 SLT compares to and/or competes against the following vehicles:


Trims

SLT (2 styles)

Style
4WD Crew Cab 172" SLT 4WD Crew Cab 159" SLT
Inventory price
Starting at $66,600 Starting at $66,400
Combined MPG
0 0
Engine
470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 470.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
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GMC Sierra 3500 trims