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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

    Est. $1,483/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $84,715

    MSRP $89,215

    Est. $1,584/mo

    Suntrup Buick GMC

    4.0
    Check Availability
    Saint Peters, MO (21 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

    $80,800

    Est. $1,511/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $76,244

    Est. $1,426/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $79,973

    Est. $1,495/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $81,711

    Est. $1,528/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $79,784

    Est. $1,492/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $76,061

    Est. $1,422/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 mi)
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  • Sterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLT

    $81,573

    Est. $1,525/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 mi)
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  • Sterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLT

    $79,973

    Est. $1,495/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 mi)
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  • Sterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLT

    $80,664

    Est. $1,508/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 mi)
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  • Sterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLTSterling 2026 GMC Sierra 3500 SLT

    $76,326

    Est. $1,427/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    4.5
    Check Availability
    Collinsville, IL (23 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

    Est. $1,477/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (23 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

    $78,448

    $1K

    MSRP $86,625

    Est. $1,467/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, MO (3 mi)
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  • Sterling Metallic 2026 GMC Sierra 3500 SLTSterling Metallic 2026 GMC Sierra 3500 SLTSterling Metallic 2026 GMC Sierra 3500 SLTSterling Metallic 2026 GMC Sierra 3500 SLTSterling Metallic 2026 GMC Sierra 3500 SLTSterling Metallic 2026 GMC Sierra 3500 SLT

    $78,898

    $1K

    MSRP $87,120

    Est. $1,475/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, MO (3 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

    $68,210

    $1K

    MSRP $75,375

    Est. $1,275/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, MO (3 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

    $74,595

    MSRP $79,095

    Est. $1,395/mo

    Suntrup Buick GMC

    4.0
    Check Availability
    Saint Peters, MO (21 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

    $84,015

    MSRP $88,515

    Est. $1,571/mo

    Suntrup Buick GMC

    4.0
    Check Availability
    Saint Peters, MO (21 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

    $73,250

    MSRP $77,750

    Est. $1,370/mo

    Suntrup Buick GMC

    4.0
    Check Availability
    Saint Peters, MO (21 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

    $71,912

    $1K

    MSRP $79,820

    Est. $1,345/mo

    Woody Buick GMC Naperville

    4.9
    Check Availability
    $299 delivery from Naperville, IL (251 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

    $69,412

    $1K

    MSRP $77,615

    Est. $1,298/mo

    Woody Buick GMC of Gurnee

    5.0
    Check Availability
    $441 delivery from Gurnee, IL (294 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 (45 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLT

    $81,573

    MSRP $88,160

    Est. $1,525/mo

    Taylor Grubaugh Chevrolet Buick GMC

    Check Availability
    West Plains, MO (149 mi)
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  • Volcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLTVolcanic Red Tintcoat 2026 GMC Sierra 3500 SLT

    $81,320

    MSRP $87,885

    Est. $1,521/mo

    Taylor Grubaugh Chevrolet Buick GMC

    Check Availability
    West Plains, MO (149 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 (109 mi)
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  • Glacier White Tricoat 2026 GMC Sierra 3500 SLTGlacier White Tricoat 2026 GMC Sierra 3500 SLTGlacier White Tricoat 2026 GMC Sierra 3500 SLTGlacier White Tricoat 2026 GMC Sierra 3500 SLTGlacier White Tricoat 2026 GMC Sierra 3500 SLTGlacier White Tricoat 2026 GMC Sierra 3500 SLT

    $81,987

    MSRP $88,610

    Est. $1,533/mo

    Taylor Grubaugh Chevrolet Buick GMC

    Check Availability
    West Plains, MO (149 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

    $76,656

    MSRP $85,655

    Est. $1,433/mo

    Taylor Grubaugh Chevrolet Buick GMC

    Check Availability
    West Plains, MO (149 mi)
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  • Summit White 2026 GMC Sierra 3500 SLT

    Not Priced

    MSRP $84,995

    Hulett Chevy Buick GMC

    4.2
    Check Availability
    Camdenton, MO (135 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:


Is the 2026 GMC Sierra 3500 SLT reliable?

The 2026 GMC Sierra 3500 has an average reliability rating of 4.5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2026 Sierra 3500 owners.

Ratings (2 reviews)

50% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.0
Interior
4.0
Performance
4.5
Value
3.5
Exterior
5.0
Reliability
4.5
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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2026 GMC Sierra 3500 SLT by city

GMC Sierra 3500 trims