CarGurus Logo Homepage Link
  • Buy
    • Used cars
    • New cars
    • Certified pre-owned
    • Start your purchase online
    • Dealerships near me
  • Sell
    • Sell my car
    • Car values
    • Sell my car FAQs
  • Finance
    • Prequalify for financing
    • How does it work?
    • Financing FAQs
  • Research
    • Test drive reviews
    • Price trends
    • Tips & advice
    • Electric cars
    • Compare cars
  • Discover
    The latest way to shop:
    smarter research, better
    listings.
  • Saved cars & searches
  • Sign in / Register
    • My account
    • Saved searches
    • Saved cars
    • Recommended cars
    • Browsing history
    • Financing dashboard
      • United States (EN)
      • Estados Unidos (ES)
      • Canada (EN)
      • Canada (FR)
      • United Kingdom

New GMC Sierra 1500 SLT for Sale near Altamont, IL

278 results
Altamont, IL
2026 GMC Sierra 1500 SLT Crew Cab 4WD Dave Sinclair Buick GMC

2026 GMC Sierra 1500

New car

$56,588

Saint Louis, MO
95 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Glacier White Tricoat
Fuel type:
Gasoline
Interior color:
Jet Black Leather
Transmission:
Automatic
Mileage:
1,247
Stock number:
T260392
VIN:
3GTUUDED5TG147178

Sponsored

2026 GMC Sierra 1500 SLT Crew Cab 4WD

2026 GMC Sierra 1500

New car

$53,186

Saint Louis, MO
95 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Titanium Rush Metallic
Fuel type:
Gasoline
Interior color:
Jet Black Leather
Transmission:
Automatic
Mileage:
3
Stock number:
T260770
VIN:
3GTUUDED5TG213910

Sponsored

2026 GMC Sierra 1500 SLT Crew Cab 4WD

2026 GMC Sierra 1500

New car | MSRP $69,020

$66,770

Red Bud, IL
91 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
White
Fuel type:
Gasoline
Interior color:
HVE/DARK
Transmission:
Automatic
Mileage:
4
Stock number:
7993
VIN:
3GTUUDEL9TG220222

Sponsored

2026 GMC Sierra 1500 SLT Crew Cab 4WD

2026 GMC Sierra 1500

New car | MSRP $68,935

$57,126

Mattoon, IL
34 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Volcanic Red Tintcoat
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Stock number:
G39362
VIN:
3GTUUDED1TG210793

2026 GMC Sierra 1500 SLT Crew Cab 4WD

2026 GMC Sierra 1500

New car | MSRP $67,340

$55,748

Mattoon, IL
34 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Onyx Black
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Stock number:
G39391
VIN:
3GTUUDED7TG227632

2025 GMC Sierra 1500 SLT Crew Cab 4WD

2025 GMC Sierra 1500

New car | MSRP $70,270

$59,074

Litchfield, IL
49 mi away
Year:
2025
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Black
Transmission:
Automatic
Mileage:
10
Stock number:
B11093
VIN:
1GTUUDEL6SZ323693

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $68,020

$56,342

Mattoon, IL
34 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Glacier White Tricoat
Fuel type:
Gasoline
Interior color:
Black
Transmission:
Automatic
Mileage:
5
Stock number:
G39009
VIN:
1GTUUDED9TZ183021

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $65,060

$50,441

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
2,498
Stock number:
L261400
VIN:
1GTUUDED3TZ187338

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $61,290

$49,105

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Sterling Metallic
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L262550
VIN:
3GTUUDED9TG206720

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $65,800

$54,596

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
420 hp 6.2L V8
Exterior color:
Sterling Metallic
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L262798
VIN:
3GTUUDEL8TG219756

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $68,135

$57,943

Mattoon, IL
34 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
3L I6 Diesel
Exterior color:
Sterling Metallic
Fuel type:
Diesel
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
3
Stock number:
G39246
VIN:
3GTUUDE83TG187732

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $65,595

$50,914

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
2,305
Stock number:
L261000
VIN:
3GTUUDED6TG127098

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $64,095

$52,587

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Onyx Black
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L263047
VIN:
3GTUUDED2TG226212

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $66,090

$53,353

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Onyx Black
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
800
Stock number:
L261446
VIN:
3GTUUDED0TG151946

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $64,095

$52,587

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Titanium Rush Metallic
Fuel type:
Gasoline
Interior color:
Dark Walnut/Slate
Transmission:
Automatic
Mileage:
7
Stock number:
L262580
VIN:
3GTUUDED3TG208785

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $64,095

$52,587

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Onyx Black
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L263179
VIN:
1GTUUDED9TZ256100

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $64,715

$52,136

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
2,328
Stock number:
L261001
VIN:
3GTUUDED2TG127096

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $66,475

$54,693

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Titanium Rush Metallic
Fuel type:
Gasoline
Interior color:
Dark Walnut/Slate
Transmission:
Automatic
Mileage:
7
Stock number:
L263044
VIN:
3GTUUDED7TG221992

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $63,600

$52,149

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Dark Walnut/Slate
Transmission:
Automatic
Mileage:
7
Stock number:
L262578
VIN:
3GTUUDED1TG208218

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $65,190

$55,556

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
3L I6 Diesel
Exterior color:
Summit White
Fuel type:
Diesel
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L262628
VIN:
3GTUUDE82TG198849

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $64,095

$51,587

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Sterling Metallic
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
877
Stock number:
L261445
VIN:
3GTUUDED1TG152071

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $64,890

$53,291

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Titanium Rush Metallic
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L262831
VIN:
3GTUUDED2TG213962

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $63,600

$51,149

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Summit White
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
2,178
Stock number:
L261704
VIN:
3GTUUDEDXTG152182

Preparing for a close up...

Photos coming soon

2026 GMC Sierra 1500

New car | MSRP $62,845

$51,481

Collinsville, IL
73 mi away
Year:
2026
Make:
GMC
Model:
Sierra 1500
Body type:
Pickup Truck
Doors:
4 doors
Drivetrain:
Four-Wheel Drive
Engine:
355 hp 5.3L V8
Exterior color:
Titanium Rush Metallic
Fuel type:
Gasoline
Interior color:
Jet Black
Transmission:
Automatic
Mileage:
7
Stock number:
L262579
VIN:
3GTUUDED2TG207370

  1. Home
  2. / New Cars
  3. / GMC Sierra 1500
  4. / SLT
  5. / Illinois
  6. / Altamont
FAQs

GMC Sierra 1500 SLT FAQs

What is the fuel economy of the GMC Sierra 1500 SLT?

Depending on the engine and options, the GMC Sierra 1500 SLT gets between 16 and 24 MPG (or MPGe).

What fuel types are available?

Diesel, Flex Fuel Vehicle, Gasoline engines are available.

Connect with us
Download our app
Download on the App Store Get it on Google Play
  • Company
  • About CarGurus
  • Our team
  • Press
  • Investor relations
  • Price trends
  • Careers
  • Advertise with CarGurus
  • For dealers
  • Dealer signup
  • Dealer resources
  • Terms
  • Terms of use
  • Privacy policy
  • Interest-based ads
  • Security
  • Help
  • Help center
  • Contact us
Click for the BBB Business Review of this Auto Listing Service in Cambridge MA
    • United States (EN)
    • Estados Unidos (ES)
    • Canada (EN)
    • Canada (FR)
    • United Kingdom

© 2025 CarGurus, Inc., All Rights Reserved.