Trim Report

GMC Sierra AT42018

Includes:15SIPU4WD|AT4
$18,600
Starting From
9,750
Active Listings
—
Avg Mileage

Sourced from 9,750 active dealer listings as of

Min $18,600
Max $132,879
From $18,600
Fresh

AT4 Market Overview

All Trims Combined
From$10,966
$11K–$65K
1,106 listings102,215 avg miles
AT4
From$18,600
9,750 listings|$19K–$133K
AT4X
From$35,491
3,929 listings|$35K–$109K
Denali
From$4,500
11,676 listings|$5K–$104K
Denali Ultimate
From$44,601
3,546 listings|$45K–$101K
Elevation
From$13,500
18,101 listings|$14K–$97K
Limited
From$12,459
31 listings|$12K–$30K
Pro
From$12,980
6,540 listings|$13K–$69K
SL
From$2,709
45 listings|$3K–$21K
SLE
From$1,650
4,915 listings|$2K–$70K
SLT
From$1,500
15,792 listings|$2K–$140K
W/T
From$3,000
99 listings|$3K–$25K

2018 GMC Sierra AT4 Pricing

Price Trend

Building price history...

9,750 reasons to be choosy.

High supply favors buyers. Create a scout with your exact specs and only see what matters.

Start trackingFrom $5/week

Where to Find GMC Sierra AT4

Location data for all 2018 GMC Sierra trims combined

39States

If you're near Texas, you're in luck: 13% of listings are there. But with 39 states represented, there's likely one near you too.

GMC Sierra Fuel Economy

EPA fuel economy data for all 2018 GMC Sierra trims

17–20mpg combined
·
15-18city
·
19-24hwy
·
$2,200-$3,400/yr

The 2018 GMC Sierra delivers 17 to 20 MPG combined across 14 powertrain combinations. If fuel cost matters to you, pay attention to engine and drivetrain. The spread is significant.

By Trim
Sierra 15 Hybrid 2WD - Automatic 8-spd
20mpg
5.3L 8-cyl · Rear-Wheel Drive
18 city24 hwy~$2,200/yr4/10 Average
Sierra C15 2WD - Automatic 6-spd
20mpg
4.3L 6-cyl · Rear-Wheel Drive
18 city24 hwy~$2,200/yr4/10 Average
Sierra C15 2WD - Automatic 6-spd
19mpg
5.3L 8-cyl · Rear-Wheel Drive
16 city23 hwy~$2,300/yr3/10 Poor
Sierra K15 4WD - Automatic 6-spd
19mpg
4.3L 6-cyl · 4-Wheel Drive
17 city22 hwy~$2,300/yr3/10 Poor
Sierra 15 Hybrid 4WD - Automatic 8-spd
18mpg
5.3L 8-cyl · 4-Wheel Drive
16 city21 hwy~$2,450/yr3/10 Poor
Sierra C15 2WD - Automatic 8-spd
18mpg
5.3L 8-cyl · Rear-Wheel Drive
16 city22 hwy~$2,450/yr3/10 Poor
Sierra K15 4WD - Automatic 6-spd
18mpg
5.3L 8-cyl · 4-Wheel Drive
16 city22 hwy~$2,450/yr3/10 Poor
Sierra C15 2WD - Automatic 8-spd
17mpg
6.2L 8-cyl · Rear-Wheel Drive
15 city21 hwy~$3,400/yr3/10 Poor
Sierra C15 Cab Chassis 2WD - Automatic 6-spd
17mpg
5.3L 8-cyl · Rear-Wheel Drive
15 city20 hwy~$2,600/yr3/10 Poor
Sierra K15 4WD - Automatic 8-spd
17mpg
6.2L 8-cyl · 4-Wheel Drive
15 city20 hwy~$3,400/yr3/10 Poor
Sierra K15 4WD - Automatic 8-spd
17mpg
5.3L 8-cyl · 4-Wheel Drive
15 city20 hwy~$2,600/yr3/10 Poor
Sierra K15 Cab Chassis 4WD - Automatic 6-spd
17mpg
5.3L 8-cyl · 4-Wheel Drive
15 city19 hwy~$2,600/yr3/10 Poor

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

2018 GMC Sierra AT4 FAQ

Trim-specific pricing and feature questions

How does the AT4 compare to other GMC Sierra trims?

with 9,750 listings tracked, the AT4 sits in a specific spot in the 2018 GMC Sierra lineup. Compare pricing across all trims on the 2018 GMC Sierra page.

What should I know about maintaining the 2018 GMC Sierra AT4?

The AT4 shares its core mechanicals with other GMC Sierra trims, so major service intervals are similar. The 2018 model page has the details.

What are the best years for the GMC Sierra AT4?

The best model year for the GMC Sierra AT4 comes down to the price-to-mileage ratio. Compare all years on the GMC Sierra overview.

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