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  • 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

    $67,792

    MSRP $67,670

    Est. $1,274/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $57,352

    $6.5K

    MSRP $70,780

    Est. $1,078/mo

    Reynolds GMC

    4.8
    West Covina, CA (5 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

    $60,262

    $6.2K

    MSRP $70,390

    Est. $1,133/mo

    Reynolds GMC

    4.8
    West Covina, CA (5 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

    $50,267

    $6.3K

    MSRP $61,395

    Est. $945/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Ontario, CA (15 mi)
    Check Availability
  • White 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLT

    $41,998

    $1K
    25,945 mi.
    Est. $789/mo

    CarMax Costa Mesa

    4.4
    Costa Mesa, CA (24 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

    $38,622

    $3.5K
    19,841 mi.
    Est. $726/mo

    Sutherlin Kia Huntington Beach

    4.4
    Huntington Beach, CA (25 mi)
    Check Availability
  • Sterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLT

    $38,434

    30,252 mi.
    Est. $722/mo

    Sutherlin Subaru Huntington Beach

    4.8
    Huntington Beach, CA (25 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

    $40,622

    $1.5K
    19,841 mi.
    Est. $764/mo

    Sutherlin Kia Huntington Beach

    4.4
    Huntington Beach, CA (25 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

    $50,267

    $6.3K

    MSRP $61,395

    Est. $945/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Ontario, CA (15 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

    $58,048

    MSRP $63,225

    Est. $1,091/mo

    Hardin Buick GMC

    4.6
    Anaheim, CA (15 mi)
    Check Availability
  • Sterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLT

    $63,588

    $5.9K

    MSRP $69,465

    Est. $1,195/mo

    Hardin Buick GMC

    4.6
    Anaheim, CA (15 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

    $63,093

    $5.9K

    MSRP $68,970

    Est. $1,186/mo

    Hardin Buick GMC

    4.6
    Anaheim, CA (15 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

    $66,607

    MSRP $69,485

    Est. $1,252/mo

    Simpson Buick GMC of Buena Park

    4.8
    Buena Park, CA (14 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

    $63,847

    MSRP $67,725

    Est. $1,200/mo

    Simpson Buick GMC of Buena Park

    4.8
    Buena Park, CA (14 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

    $50,267

    $6.3K

    MSRP $61,395

    Est. $945/mo

    Mark Christopher Chevrolet Buick GMC Cadillac

    4.6
    Ontario, CA (15 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

    $61,432

    MSRP $65,310

    Est. $1,155/mo

    Simpson Buick GMC of Buena Park

    4.8
    Buena Park, CA (14 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

    $67,277

    MSRP $70,155

    Est. $1,265/mo

    Simpson Buick GMC of Buena Park

    4.8
    Buena Park, CA (14 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

    $64,012

    MSRP $66,890

    Est. $1,203/mo

    Simpson Buick GMC of Buena Park

    4.8
    Buena Park, CA (14 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

    $41,947

    $181
    18,372 mi.
    Est. $788/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $50,999

    6,738 mi.
    Est. $959/mo

    Tuttle-Click Ford

    Irvine, CA (28 mi)
    Check Availability
  • Sterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLTSterling 2026 GMC Sierra 1500 SLT

    $63,588

    $5.9K

    MSRP $69,465

    Est. $1,195/mo

    Hardin Buick GMC

    4.6
    Anaheim, CA (15 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

    $62,442

    MSRP $67,740

    Est. $1,174/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $72,123

    MSRP $67,865

    Est. $1,356/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $41,961

    19,226 mi.
    Est. $789/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $62,442

    MSRP $67,740

    Est. $1,174/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $62,442

    MSRP $67,740

    Est. $1,174/mo

    Tustin Buick GMC

    3.1
    Tustin, CA (21 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

    $58,048

    MSRP $63,225

    Est. $1,091/mo

    Hardin Buick GMC

    4.6
    Anaheim, CA (15 mi)
    Check Availability

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

    $66,462

    MSRP $66,340

    Est. $1,249/mo

    Costa Mesa GMC

    1.5
    Costa Mesa, CA (25 mi)
    Check Availability
  • White 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLT

    $43,998

    $1K
    18,010 mi.
    Est. $827/mo

    CarMax Kearny Mesa

    4.4
    Free delivery to Duarte, CA (11 mi)
    Check Availability
  • White 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLTWhite 2026 GMC Sierra 1500 SLT

    $42,998

    26,239 mi.
    Est. $808/mo

    CarMax Murrieta

    4.5
    Free delivery to Duarte, CA (11 mi)
    Check Availability

GMC Sierra 1500 prices by year

Model year Average price Deals
2025 GMC Sierra 1500 SLT $39,672 7 Great deals

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