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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

    $74,245

    Est. $1,388/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    4.0
    Check Availability
    Saint Peters, MO (14 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

    4.0
    Check Availability
    Saint Peters, MO (14 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

    MSRP $87,120

    Est. $1,475/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, 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

    $67,210

    MSRP $75,375

    Est. $1,257/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, 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

    $78,448

    MSRP $86,625

    Est. $1,467/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, 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

    $73,245

    $750
    Est. $1,370/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    4.0
    Check Availability
    Saint Peters, MO (14 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

    $81,050

    Est. $1,516/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $79,245

    Est. $1,482/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $81,823

    Est. $1,530/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $80,245

    Est. $1,501/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $81,961

    Est. $1,533/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $80,223

    Est. $1,500/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $80,583

    Est. $1,507/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $78,245

    $250
    Est. $1,463/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $79,581

    Est. $1,488/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $80,034

    Est. $1,497/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $76,494

    Est. $1,430/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $80,914

    $2.7K
    Est. $1,513/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $76,576

    $2.7K
    Est. $1,432/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $76,947

    $2.7K
    Est. $1,439/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 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

    $80,223

    Est. $1,500/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 mi)
    Quick view
  • 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

    $75,245

    Est. $1,407/mo

    Laura Buick GMC

    4.5
    Check Availability
    Collinsville, IL (19 mi)
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  • Summit White 2026 GMC Sierra 3500 SLT

    $69,412

    MSRP $77,615

    Est. $1,298/mo

    Woody Buick GMC of Gurnee

    5.0
    Check Availability
    $422 delivery from Gurnee, IL (282 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

    $69,912

    $7.6K

    MSRP $78,110

    Est. $1,307/mo

    Woody Buick GMC of Gurnee

    5.0
    Check Availability
    $422 delivery from Gurnee, IL (282 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 5 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2026 Sierra 3500 owners.

Ratings (1 review)

Rating breakdown (out of 5):
Comfort
3.0
Interior
5.0
Performance
5.0
Value
3.0
Exterior
5.0
Reliability
5.0
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