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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $35,985

    76,323 mi.
    Est. $662/mo

    Suntrup Kia South

    4.8
    Check Availability
    St. Louis, MO (27 mi)
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  • Summit White / White 2020 GMC Sierra 1500 AT4Summit White / White 2020 GMC Sierra 1500 AT4Summit White / White 2020 GMC Sierra 1500 AT4Summit White / White 2020 GMC Sierra 1500 AT4Summit White / White 2020 GMC Sierra 1500 AT4Summit White / White 2020 GMC Sierra 1500 AT4

    $38,900

    79,523 mi.
    Est. $716/mo

    Pundmann Ford

    4.6
    Check Availability
    Saint Charles, MO (12 mi)
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  • Gray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 DenaliGray 2020 GMC Sierra 1500 Denali

    $42,998

    52,533 mi.
    Est. $791/mo

    CarMax St. Louis South Lindbergh

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    St. Louis, MO (27 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 1500 DenaliCarbon Black Metallic 2020 GMC Sierra 1500 DenaliCarbon Black Metallic 2020 GMC Sierra 1500 DenaliCarbon Black Metallic 2020 GMC Sierra 1500 DenaliCarbon Black Metallic 2020 GMC Sierra 1500 DenaliCarbon Black Metallic 2020 GMC Sierra 1500 Denali

    $36,995

    98,221 mi.
    Est. $681/mo

    Continental Auto Sales of Maryland Heights

    4.1
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    Maryland Heights, MO (14 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLT

    $31,116

    90,215 mi.
    Est. $573/mo

    Dave Sinclair Lincoln St. Peters

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    Saint Peters, MO (8 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLT

    $34,409

    87,720 mi.
    Est. $633/mo

    Lou Fusz Buick GMC

    4.5
    Check Availability
    St. Louis, MO (18 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4

    $31,985

    124,114 mi.
    Est. $589/mo

    Suntrup Kia South

    4.8
    Check Availability
    St. Louis, MO (27 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4Pacific Blue Metallic 2020 GMC Sierra 1500 AT4

    $32,454

    91,038 mi.
    Est. $597/mo

    Clement Hyundai

    4.5
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    Wentzville, MO (7 mi)
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  • Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4Summit White 2020 GMC Sierra 1500 AT4

    $36,532

    72,848 mi.
    Est. $672/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, MO (26 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 1500 SLEPacific Blue Metallic 2020 GMC Sierra 1500 SLEPacific Blue Metallic 2020 GMC Sierra 1500 SLEPacific Blue Metallic 2020 GMC Sierra 1500 SLEPacific Blue Metallic 2020 GMC Sierra 1500 SLEPacific Blue Metallic 2020 GMC Sierra 1500 SLE

    $25,656

    $631
    89,424 mi.
    Est. $472/mo

    Dave Sinclair Buick GMC

    4.9
    Check Availability
    Saint Louis, MO (26 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $31,500

    140,224 mi.
    Est. $580/mo

    Jim Butler Chevrolet

    4.3
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    Fenton, MO (23 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $37,500

    54,694 mi.
    Est. $690/mo

    Clement Supercenter

    2.6
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    St. Charles, MO (10 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 DenaliRed Quartz Tintcoat 2020 GMC Sierra 1500 DenaliRed Quartz Tintcoat 2020 GMC Sierra 1500 DenaliRed Quartz Tintcoat 2020 GMC Sierra 1500 DenaliRed Quartz Tintcoat 2020 GMC Sierra 1500 DenaliRed Quartz Tintcoat 2020 GMC Sierra 1500 Denali

    $44,700

    18,103 mi.
    Est. $823/mo

    Clement Supercenter

    2.6
    Check Availability
    St. Charles, MO (10 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4Red Quartz Tintcoat 2020 GMC Sierra 1500 AT4

    $37,995

    78,078 mi.
    Est. $699/mo

    Dave Sinclair Lincoln St. Peters

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    Saint Peters, MO (8 mi)
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  • $21,700

    $290
    110,901 mi.
    Est. $399/mo

    Suntrup Buick GMC

    3.7
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    Saint Peters, MO (9 mi)
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  • Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4Black 2020 GMC Sierra 1500 AT4

    $35,998

    105,733 mi.
    Est. $663/mo

    CarMax Rogers

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    $99 delivery to St. Peters, MO (8 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $29,995

    108,308 mi.
    Est. $552/mo

    Blue Sky Auto Sales - Crestwood

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    $399 delivery from Crestwood, IL (255 mi)
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  • Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4Onyx Black 2020 GMC Sierra 1500 AT4

    $32,985

    134,509 mi.
    Est. $607/mo

    Quality Buick GMC Cadillac

    4.0
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    Alton, IL (33 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $27,923

    $1.1K
    143,701 mi.
    Est. $514/mo

    Sapaugh GM Country

    4.8
    Check Availability
    Herculaneum, MO (40 mi)
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  • Cardinal Red 2020 GMC Sierra 1500 SLTCardinal Red 2020 GMC Sierra 1500 SLTCardinal Red 2020 GMC Sierra 1500 SLTCardinal Red 2020 GMC Sierra 1500 SLTCardinal Red 2020 GMC Sierra 1500 SLTCardinal Red 2020 GMC Sierra 1500 SLT

    $27,995

    132,197 mi.
    Est. $515/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (40 mi)
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  • White 2020 GMC Sierra 1500White 2020 GMC Sierra 1500White 2020 GMC Sierra 1500White 2020 GMC Sierra 1500White 2020 GMC Sierra 1500White 2020 GMC Sierra 1500

    $26,445

    $2.4K
    73,481 mi.
    Est. $487/mo

    Cardinal Buick GMC Inc.

    3.7
    Check Availability
    Belleville, IL (42 mi)
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  • White Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLTWhite Frost Tri-Coat 2020 GMC Sierra 1500 SLT

    $23,995

    $1K
    147,077 mi.
    Est. $442/mo

    Laura Buick GMC

    4.6
    Check Availability
    Collinsville, IL (40 mi)
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  • Onyx Black 2020 GMC Sierra 1500 Denali

    $34,347

    128,909 mi.
    Est. $632/mo

    Sapaugh GM Country

    4.8
    Check Availability
    Herculaneum, MO (40 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 $57,483 1 Good deal
2025 GMC Sierra 1500 $49,679 12 Great deals
2024 GMC Sierra 1500 $47,509 7 Great deals
2023 GMC Sierra 1500 $45,594 11 Good deals
2021 GMC Sierra 1500 $35,116 7 Great deals

About the 2020 GMC Sierra 1500

Basics

Base shown (base trim).

Seating
3
Door count
2
Drivetrain
Rear-wheel drive
Combined MPG
17
Transmission
6-Speed A/T
Engine
285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability)
Side view of the 2020 GMC Sierra 1500
FAQs

How much does the 2020 GMC Sierra 1500 cost?

The 2020 GMC Sierra 1500 price depends on several factors, including the trim level, optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 is $34,069, with pricing starting at $14,995.

What is the MPG of the 2020 GMC Sierra 1500?

The 2020 GMC Sierra 1500 offers up to 15 MPG in city driving and 21 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 trim, driving conditions, driving habits, vehicle maintenance, and other factors.

What are some similar vehicles and competitors of the 2020 GMC Sierra 1500?

The 2020 GMC Sierra 1500 compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 1500 reliable?

The 2020 GMC Sierra 1500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 1500 owners.

Is the 2020 GMC Sierra 1500 a good truck?

Below are the Cars.com consumer ratings for the 2020 GMC Sierra 1500.

(69 reviews)
Rating breakdown (out of 5):
Comfort
4.9
Interior
4.8
Performance
4.8
Value
4.6
Exterior
4.9
Reliability
4.7
Ratings (69 reviews)

91% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.8
Performance
4.8
Value
4.6
Exterior
4.9
Reliability
4.7
Trims

AT4 (3 styles)

Style
4WD Double Cab 147" AT4 4WD Crew Cab 157" AT4 4WD Crew Cab 147" AT4
Inventory price
Starting at $51,300 Starting at $54,000 Starting at $53,700
Combined MPG
18 18 18
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel)

Base (8 styles)

Style
4WD Reg Cab 140" 2WD Reg Cab 140" 4WD Crew Cab 157" 2WD Double Cab 147" 2WD Crew Cab 147" 4WD Double Cab 147" 2WD Crew Cab 157" 4WD Crew Cab 147"
Inventory price
Starting at $34,200 Starting at $29,600 Starting at $39,500 Starting at $33,500 Starting at $35,900 Starting at $36,800 Starting at $36,200 Starting at $39,200
Combined MPG
17 17 20 20 20 20 20 20
Engine
285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) 285.0-hp, 4.3-liter, V6 Cylinder Engine (Flex Fuel Capability) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel)

Denali (4 styles)

Style
2WD Crew Cab 157" Denali 4WD Crew Cab 147" Denali 4WD Crew Cab 157" Denali 2WD Crew Cab 147" Denali
Inventory price
Starting at $55,400 Starting at $58,600 Starting at $58,900 Starting at $55,100
Combined MPG
19 18 18 19
Engine
355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)

Elevation (6 styles)

Style
4WD Crew Cab 157" Elevation 2WD Double Cab 147" Elevation 2WD Crew Cab 157" Elevation 2WD Crew Cab 147" Elevation 4WD Double Cab 147" Elevation 4WD Crew Cab 147" Elevation
Inventory price
Starting at $46,500 Starting at $40,500 Starting at $43,200 Starting at $42,900 Starting at $43,800 Starting at $46,200
Combined MPG
20 21 21 21 20 20
Engine
310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel)

SLE (6 styles)

Style
2WD Crew Cab 157" SLE 2WD Double Cab 147" SLE 4WD Double Cab 147" SLE 2WD Crew Cab 147" SLE 4WD Crew Cab 157" SLE 4WD Crew Cab 147" SLE
Inventory price
Starting at $40,700 Starting at $38,000 Starting at $41,300 Starting at $40,400 Starting at $44,000 Starting at $43,700
Combined MPG
21 21 20 20 20 20
Engine
310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel) 310.0-hp, 2.7-liter, 4 Cylinder Engine (Gasoline Fuel)

SLT (6 styles)

Style
4WD Crew Cab 147" SLT 2WD Crew Cab 147" SLT 4WD Crew Cab 157" SLT 4WD Double Cab 147" SLT 2WD Double Cab 147" SLT 2WD Crew Cab 157" SLT
Inventory price
Starting at $50,400 Starting at $46,900 Starting at $50,700 Starting at $48,000 Starting at $44,500 Starting at $47,200
Combined MPG
18 19 18 18 19 19
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
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