Trim Report

GMC Sierra SLT2021

Includes:15SIPU4WD|SLT
$925
Starting From
15,203
Active Listings
—
Avg Mileage

Sourced from 15,203 dealer listings in the latest market snapshot as of

Min $925
Max $92,372
From $925
Fresh

SLT Market Overview

All Trims Combined
From$9,599
$10K–$70K
2,509 listings78,527 avg miles
AT4
From$13,200
9,361 listings|$13K–$139K
AT4X
From$32,390
3,522 listings|$32K–$140K
Denali
From$1,000
12,458 listings|$1K–$100K
Denali Ultimate
From$45,135
3,663 listings|$45K–$101K
Elevation
From$15,885
15,507 listings|$16K–$109K
Limited
From$11,888
40 listings|$12K–$32K
Pro
From$15,000
5,542 listings|$15K–$95K
SL
From$2,000
36 listings|$2K–$17K
SLE
From$2,450
4,147 listings|$2K–$73K
SLT
From$925
15,203 listings|$925–$92K
W/T
From$750
86 listings|$750–$22K

2021 GMC Sierra SLT Pricing

Price Trend

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15,203 active listings means opportunity, but also overwhelm. Set your criteria and we'll surface the best matches.

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Where to Find GMC Sierra SLT

Location data for all 2021 GMC Sierra trims combined

40States

If you're near Texas, you're in luck: 13% of listings are there. But with 40 states represented, there's likely one near you too.

GMC Sierra Fuel Economy

EPA fuel economy data for all 2021 GMC Sierra trims

16–26mpg combined
·
15-23city
·
20-30hwy
·
$3,200-$4,800/yr

The 2021 GMC Sierra delivers 16 to 26 MPG combined across 20 powertrain combinations. If fuel cost matters to you, pay attention to engine and drivetrain. The spread is significant.

By Trim
Sierra 2WD - Automatic 10-spd
26mpg
3.0L 6-cyl Turbo · Rear-Wheel DriveDiesel
23 city30 hwy~$3,250/yr5/10 Average
Sierra 4WD - Automatic 10-spd
24mpg
3.0L 6-cyl Turbo · 4-Wheel DriveDiesel
22 city26 hwy~$3,500/yr4/10 Average
Sierra 2WD - Automatic 8-spd
21mpg
2.7L 4-cyl Turbo · Rear-Wheel Drive
20 city23 hwy~$3,200/yr4/10 Average
Sierra 2WD - Automatic 8-spd
19mpg
5.3L 8-cyl · Rear-Wheel Drive
17 city23 hwy~$3,550/yr3/10 Poor
Sierra 4WD - Automatic 10-spd
19mpg
5.3L 8-cyl · 4-Wheel Drive
16 city22 hwy~$3,550/yr3/10 Poor
Sierra 4WD - Automatic 8-spd
19mpg
2.7L 4-cyl Turbo · 4-Wheel Drive
18 city21 hwy~$3,550/yr3/10 Poor
Sierra 4WD - Automatic 8-spd
18mpg
5.3L 8-cyl · 4-Wheel Drive
16 city21 hwy~$3,750/yr3/10 Poor
Sierra 2WD - Automatic 6-spd
17mpg
5.3L 8-cyl · Rear-Wheel Drive
15 city21 hwy~$3,950/yr3/10 Poor
Sierra 2WD - Automatic 6-spd
17mpg
4.3L 6-cyl · Rear-Wheel Drive
16 city21 hwy~$3,950/yr3/10 Poor
Sierra 4WD - Automatic 10-spd
17mpg
6.2L 8-cyl · 4-Wheel Drive
16 city20 hwy~$4,800/yr3/10 Poor
Sierra 4WD - Automatic 6-spd
17mpg
5.3L 8-cyl · 4-Wheel Drive
15 city20 hwy~$3,950/yr3/10 Poor
Sierra 4WD - Automatic 6-spd
17mpg
4.3L 6-cyl · 4-Wheel Drive
15 city20 hwy~$3,950/yr3/10 Poor

Source: U.S. Environmental Protection Agency (EPA)

2021 GMC Sierra SLT FAQ

Trim-specific pricing and feature questions

How does the SLT compare to other GMC Sierra trims?

The SLT occupies a distinct position in the GMC Sierra range. See how it stacks up on the 2021 overview page.

What should I know about maintaining the 2021 GMC Sierra SLT?

Budget for standard SLT maintenance plus any trim-specific items. Review the known issues on the model year page for areas to inspect before purchasing.

What are the best years for the GMC Sierra SLT?

For the SLT, look at the price-to-mileage ratio across model years. Later model years before a redesign tend to be the most refined version of the platform. See the GMC Sierra buyer's guide.

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