Quality Buick GMC

1620 East Homer Adams Pkwy Alton, IL 62002

Check Out Our Inventory

2021 GMC Sierra 1500 OVERVIEW Overview Icon

2021 GMC Sierra 1500 in Alton

Get Current Pricing*
  • Duralife™ brake rotors
  • CornerStep rear bumper
  • Rear air vents on Double and Crew Cab models
  • StabiliTrak® with Traction Control
2021 GMC Sierra 1500 Main Img

2021 GMC Sierra 1500 MODELS

  • Sierra 1500 Base

    Sierra 1500 Base

  • Sierra 1500 SLE

    Sierra 1500 SLE

  • Sierra 1500 Elevation

    Sierra 1500 Elevation

  • Sierra 1500 SLT

    Sierra 1500 SLT

  • Sierra 1500 AT4

    Sierra 1500 AT4

  • Sierra 1500 Denali

    Sierra 1500 Denali

2021 GMC Sierra 1500 CONFIGURATIONS

* Model and trim configurations may vary
  • Sierra 1500 Double Cab, Standard Box
    Sierra 1500 Double Cab, Standard Box
  • Sierra 1500 Crew Cab, Short Box
    Sierra 1500 Crew Cab, Short Box
  • Sierra 1500 Crew Cab, Standard Box
    Sierra 1500 Crew Cab, Standard Box
  • Sierra 1500 Regular Cab, Long Box
    Sierra 1500 Regular Cab, Long Box

GMC Sierra 1500 Dealer in Alton

2021 GMC Sierra 1500 PERFORMANCE Performance Icon

2021 GMC Sierra 1500 performance

DYNAMIC FUEL MANAGEMENT SYSTEM

Included with the available 5.3L V8 and 6.2L V8 gas engines, the Dynamic Fuel Management system enables the engine to operate in 17 different patterns between 2 and 8 cylinders, depending on demand, to optimize power delivery and efficiency.

2021 GMC Sierra 1500 performance

10-SPEED AUTOMATIC TRANSMISSION

10-speed automatic transmission features closer gear spacing that allows the engine to operate in an optimal range at all times with varying load and terrain conditions. Electronically controlled with overdrive and tow/haul mode. Includes Cruise Grade Braking and Powertrain Grade Braking.
Included and only available with 5.3L EcoTec3 V8 engine on 4WD models, 6.2L EcoTec3 V8 engine or Duramax 3.0L Turbo-Diesel I6 engine.

2021 GMC Sierra 1500 performance

ACTIVE THERMAL MANAGEMENT

  • Helps the engine warm up quickly and maintain an optimal temperature for performance and efficiency
  • Once warmed, the system will pinpoint temperature levels at different locations on the engine to help give optimum combustion
  • Uses a three-actuator rotary valve system to distribute coolant through the engine in a targeted manner to help the engine run more efficiently
2021 GMC Sierra 1500 performance

AVAILABLE 2-SPEED AUTOTRAC TRANSFER CASE

Sierra is the first truck in its class to offer a 2-speed AutoTrac transfer case with an active automatic 4WD setting that provides seamless shifting between two- and four-wheel drive based on road conditions.

2021 GMC Sierra 1500 APPEARANCE Appearance Icon

2021 GMC Sierra 1500 Appearance Main Img
2021 GMC Sierra 1500 appearance

Chrome accents on SLE & SLT add class and distinction to Sierra’s exterior.

2021 GMC Sierra 1500 appearance

Purpose meets style with Sierra’s signature, C-shaped LED lighting and large, bold grille.

2021 GMC Sierra 1500 appearance

The CornerStep Rear Bumper helps make access to the cargo bed easier than ever.

2021 GMC Sierra 1500 COMFORT Comfort Icon

2021 GMC Sierra 1500 comfort

CLASS-LEADING FRONT HEAD AND LEG ROOM

Outside, the stance is tall and bold, and inside the large proportions help give you the added confidence of sitting high. You can also stretch out with Sierra crew cab’s class-leading expansive front head and leg room.

2021 GMC Sierra 1500 comfort

DRIVER-FOCUSED DETAILS

  • Available Leather-wrapped steering wheel
  • Class-leading crew cab front head and leg room
  • Purposeful interior lighting
  • Driver-centric controls and buttons
2021 GMC Sierra 1500 comfort

REAR-SEAT COMFORT

Wider rear-door openings and ample rear-seat leg room help make your passengers feel comfortable, while rear vents and available leather-appointed heated rear outboard seats help them stay that way.

2021 GMC Sierra 1500 comfort

USB CONNECTION

On the road, you want to stay plugged in. With multiple USB ports, you and your passengers can charge up and keep going.

2021 GMC Sierra 1500 SAFETY & WARRANTY Safety Icon

PRO GRADE PROTECTION

Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:

  • 3-year / 36,000-mile Bumper-to-Bumper Limited Warranty
  • 5-year / 60,000-mile Powertrain Limited Warranty
  • 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
  • 3-year / 36,000-mile Corrosion Protection
  • 6-year / 100,000-mile Rust-Through Protection
  • First maintenance visit
2021 GMC Sierra 1500 Safety Main Img
2021 GMC Sierra 1500 safety

AVAILABLE ADAPTIVE CRUISE CONTROL

Adaptive Cruise Control can automatically maintain a driver-selected gap time from the detected vehicle you’re following while you steer. This feature reduces the need to frequently brake and accelerate when you’re driving.

2021 GMC Sierra 1500 safety

AVAILABLE FRONT AND REAR PARK ASSIST

Front and Rear Park Assist can provide distance alerts to nearby detected objects in front of or behind your vehicle to help you park and avoid collisions at low speeds.

2021 GMC Sierra 1500 safety

INTEGRATED TRAILER BRAKE CONTROLLER

Provides fingertip control and monitoring of your trailer brakes. The in-vehicle Trailering App allows drivers to program trailer brake level settings to specific trailer profiles. Available on Sierra, SLE and Elevation. Standard on SLT, AT4 and Denali.

Check Out Our Inventory

Disclaimers