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  • Glacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLT

    $58,348

    MSRP $71,120

    Est. $1,099/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $60,222

    MSRP $73,494

    Est. $1,135/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $56,753

    MSRP $69,525

    Est. $1,069/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $56,503

    MSRP $69,275

    Est. $1,064/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $57,782

    MSRP $70,554

    Est. $1,089/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $53,233

    MSRP $66,005

    Est. $1,003/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $56,753

    MSRP $69,525

    Est. $1,069/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $56,503

    MSRP $69,275

    Est. $1,064/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $57,003

    MSRP $69,775

    Est. $1,074/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $53,733

    MSRP $66,505

    Est. $1,012/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $56,503

    MSRP $69,275

    Est. $1,064/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $57,098

    MSRP $69,870

    Est. $1,076/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Glacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLT

    $55,078

    MSRP $67,850

    Est. $1,038/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $54,228

    MSRP $67,000

    Est. $1,022/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $52,188

    MSRP $65,460

    Est. $983/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $56,503

    MSRP $69,275

    Est. $1,064/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $55,643

    MSRP $68,415

    Est. $1,048/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $59,033

    MSRP $71,805

    Est. $1,112/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $56,103

    MSRP $68,875

    Est. $1,057/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $56,008

    MSRP $68,780

    Est. $1,055/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $54,098

    $500

    MSRP $69,370

    Est. $1,019/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $59,827

    MSRP $72,599

    Est. $1,127/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Coastal Dune 2026 GMC Sierra 1500 SLTCoastal Dune 2026 GMC Sierra 1500 SLTCoastal Dune 2026 GMC Sierra 1500 SLTCoastal Dune 2026 GMC Sierra 1500 SLTCoastal Dune 2026 GMC Sierra 1500 SLTCoastal Dune 2026 GMC Sierra 1500 SLT

    $58,577

    MSRP $71,349

    Est. $1,104/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $56,008

    MSRP $68,780

    Est. $1,055/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $53,633

    MSRP $66,405

    Est. $1,010/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $52,143

    MSRP $64,915

    Est. $982/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $55,378

    MSRP $68,150

    Est. $1,043/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability

  • Sterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLTSterling Metallic 2026 GMC Sierra 1500 SLT

    $51,363

    MSRP $68,635

    Est. $968/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $55,013

    MSRP $67,785

    Est. $1,036/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $53,238

    MSRP $66,510

    Est. $1,003/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Glacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLTGlacier White Tricoat 2026 GMC Sierra 1500 SLT

    $58,348

    MSRP $71,120

    Est. $1,099/mo

    Ross Downing GMC of Gonzales

    4.1
    Gonzales, LA (26 mi)
    Check Availability
  • Onyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLTOnyx Black 2026 GMC Sierra 1500 SLT

    $49,599

    $628

    MSRP $68,600

    Est. $934/mo

    VanGuard GMC

    4.7
    $580 delivery from Sherman, TX (387 mi)
    Check Availability
  • Summit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLTSummit White 2026 GMC Sierra 1500 SLT

    $50,515

    MSRP $67,310

    Est. $952/mo

    VanGuard GMC

    4.7
    $580 delivery from Sherman, TX (387 mi)
    Check Availability

About the 2026 GMC Sierra 1500 SLT

Basics

SLT shown.

Seating
5
Door count
4
Drivetrain
Rear Wheel Drive
Combined MPG
17
Transmission
10-Speed A/T
Engine
305.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Diesel Fuel)
Side view of the 2026 GMC Sierra 1500 SLT
FAQs

How much does the 2026 GMC Sierra 1500 SLT cost?

The 2026 GMC Sierra 1500 SLT price depends on optional features. Prices typically start at $55,400.

What is the MPG of the 2026 GMC Sierra 1500 SLT?

The 2026 GMC Sierra 1500 SLT offers up to 16 MPG in city driving and 20 MPG on the highway for a combined rating of 17 MPG.

These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.

What are some similar vehicles and competitors of the 2026 GMC Sierra 1500 SLT?

The 2026 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:


Is the 2026 GMC Sierra 1500 SLT reliable?

The 2026 GMC Sierra 1500 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 2026 Sierra 1500 owners.

Ratings (7 reviews)

85% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.4
Interior
4.4
Performance
4.6
Value
3.9
Exterior
4.6
Reliability
4.6
Trims

SLT (3 styles)

Style
2WD Crew Cab 147" SLT 4WD Crew Cab 147" SLT 4WD Crew Cab 157" SLT
Inventory price
Starting at $55,400 Starting at $58,500 Starting at $59,200
Combined MPG
17 16 16
Engine
305.0-hp, 3.0-liter, Straight 6 Cylinder Engine (Diesel Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)

2026 GMC Sierra 1500 SLT by city

2026 GMC Sierra 1500 trims