2026 GMC Sierra 1500 · Trim vs trim · Crew Cab short bed

2026 GMC Sierra 1500 AT4 vs AT4X: what's the difference?

The AT4X costs $11,600 more. It starts at $79,900 as a , and the AT4 at $68,300. The AT4X adds a , a , and a . In all, 8 parts differ, listed below. As they come, it's rated to tow 8,500 lb, 200 less than the AT4's 8,700. Its is 1,380 lb, 290 less than the AT4's 1,670.

Our Sierra data has eight 2026 Sierra 1500 on the Crew Cab short bed, their modeled engines, drive systems and core towing and off-road . It doesn't have other cabs and beds, HD or EV trucks, paint, dealer or every equipment package yet, so something missing from this page may still be offered.

AT4$68,300
AT4X$79,900

What changes, as they come

Numbers
WhatAT4AT4X
Towing, as it comesAT48,700 lbAT4X8,500 lb
Payload, best caseAT41,670 lbAT4X1,380 lb
City mpgAT422 mpgAT4X19 mpg
Highway mpgAT426 mpgAT4X20 mpg
Tire diameterAT433.0″AT4X33.2″
Wheel sizeAT420″AT4X18″
Ground clearanceAT411.1″AT4X11.5″
Parts
WhatAT4AT4X
Front axleAT4Open front differentialAT4XSelectable front locker
Rear axleAT4G80 automatic locking rear differentialAT4XSelectable rear locker
SuspensionAT4AT4 factory 2-inch liftAT4XAT4X factory 2-inch lift
DampersAT4Rancho monotube shocksAT4XMultimatic DSSV spool-valve dampers
WheelsAT420-inch aluminum wheelsAT4X18-inch aluminum wheels
TiresAT4275/60R20 all-terrainAT4XLT275/70R18 mud-terrain
Fender flaresAT4Standard wheel arch moldingsAT4XAT4X wheel arch moldings
Front bumperAT4at4 front bumperAT4XAT4X AEV steel front bumper
Equipment
WhatAT4AT4X
15-inch head-up displayAT4Not includedAT4XYes
Power sunroofAT4Not includedAT4XYes

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Switch to the AT4 in the trim list to see what goes away, or add packages to either and watch the drawing change.

The AT4X Crew Cab short bed, as it comes

↑ The answer

AT4X

$79,900

Crew Cab, Short Bed

5.8 FT BED33.2″ TIRE147.5″ WHEELBASE
Tow
lb
·
Payload
lb
·
Bed
ft
·
Torque
lb-ft
·

Choose a trim

Packages & options

Engine & drive

Towing

Off-road

Bed & utility

What your options change

This is a stock AT4X. Pick a package and every part it swaps shows up here, and in orange on the truck.

  • Has Auto 4WD
  • Has Low range
  • No Max Trailering
  • Has Front locker
  • Has Rear locker
  • Has Off-road
  • Has Heated seats
  • Has Ventilated seats
  • Has 360° camera
Tailgate
Six-function MultiPro
Dampers
Multimatic DSSV spool-valve dampers
Engine
3.0L Duramax turbo-diesel I6 · 305 hp
Transmission
Duramax 10-speed automatic with Electronic Precision Shift (MQC)
Transfer case
Two-speed Autotrac
Rear differential
Selectable rear locker
Axle ratio
3.23:1
GCWR
15,000 lb
Wheels
18″
Tires
LT275/70R18
Touchscreen
13.4″ · 12.3″ driver display
Factory lift
2″
Clearance
11.50″ nominal
Bed floor
69.92″ · 62.9 cu ft

Open this build in the full Sierra guide →

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All vehicles

Latest model years. Starting prices and best published ratings, rather than your selected build.

Lower starting price than the Sierra

2026 Sierra: $44,500

Before destination and options. Cab and body styles can differ. Sierra: Pro · Crew Cab, Short Bed.

Higher available horsepower than the Sierra

2026 Sierra: 420 hp

Highest published output in each guide.

Higher tow rating than the Sierra

2026 Sierra: 13,100 lb

With required equipment. Check your truck’s labels and loaded limits.

About these comparisons

Each illustration and link uses the build behind its number. Comparisons cover the model years and bodies in our guides. Different rows can use different trims and equipment. Missing values aren’t treated as zero; reported prices and inferred ratings aren’t ranked.

  • Lowest listed trim price in each guide, before destination, options, taxes and fees. Cab and body styles can differ.
  • Highest published output found in each guide. This compares available power, not acceleration or the trim you selected.
  • Highest published rating found in each guide, with required equipment. Actual truck labels, occupants and cargo determine your limit.