Trim Report

GMC Sierra AT4X2021

Includes:15SIPU4WD|AT4X
$32,390
Starting From
3,522
Active Listings
Avg Mileage

Sourced from 3,522 dealer listings in the latest market snapshot as of

Min $32,390
Max $139,608
From $32,390
Fresh

2021 GMC Sierra AT4X Pricing

Price Trend

Building price history...

Plenty of options. Let us narrow it down.

3,522 active listings means opportunity, but also overwhelm. Set your criteria and we'll surface the best matches.

Where to Find GMC Sierra AT4X

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 AT4X FAQ

Trim-specific pricing and feature questions

How does the AT4X compare to other GMC Sierra trims?

with 3,522 listings tracked, the AT4X sits in a specific spot in the 2021 GMC Sierra lineup. Compare pricing across all trims on the 2021 GMC Sierra page.

What should I know about maintaining the 2021 GMC Sierra AT4X?

Budget for standard AT4X 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 AT4X?

The best model year for the GMC Sierra AT4X comes down to the price-to-mileage ratio. Compare all years on the GMC Sierra overview.

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