2026 Ford F-150 Lariat vs 2026 GMC Sierra 1500 AT4
$3,440 less and 95 more hp vs 4 MPG better. That is the real fork. Key numbers: $3,440 price gap, 400 vs 305 hp, 19 vs 23 MPG.
The F-150 Lariat leads on $3,440 less, 95 more hp. The Sierra 1500 AT4 leads on 4 MPG better. The spec table compares 7 specifications head to head.
Key Differences at a Glance
What's Actually Different
These two vehicles differ in 7 specifications.
Full Specification Comparison
Specifications and pricing reflect available data as of early 2026 and may not match current manufacturer figures. Always confirm details with an authorized dealer before making a purchase decision.
| Spec | 2026 Ford F-150 Lariat | 2026 GMC Sierra 1500 AT4 |
|---|---|---|
| Pricing | ||
| MSRP | $63,360 | $66,800 |
| Powertrain | ||
| Engine | 3.5L V6 Turbo | 3.0L I6 diesel Turbo |
| Horsepower | 400 hp | 305 hp |
| Torque | 500 lb-ft | 495 lb-ft |
| Transmission | 10-speed shiftable automatic | 10-speed shiftable automatic |
| Drivetrain | 4WD | 4WD |
| Fuel Economy | ||
| City MPG | 16 | 21 |
| Highway MPG | 24 | 24 |
| Combined MPG | 19 | 23 |
| Fuel Tank | 36.0 gal | 24.0 gal |
| Dimensions | ||
| Curb Weight | 5,096 lbs | 5,500 lbs |
| Wheelbase | 145.4" | 148.0" |
| Length | 232.0" | 232.9" |
| Width | 79.9" | 81.2" |
| Height | 77.1" | 78.4" |
| Truck Specs | ||
| Cab Type | SuperCrew | Crew Cab |
| Bed Length | 5.5 ft | 5.8 ft |
| Safety | ||
| NHTSA Overall | 5/5 stars | 5/5 stars |
| Warranty | ||
| Bumper-to-Bumper | 3yr/36k | 3yr/36k |
| Powertrain | 5yr/60k | 5yr/60k |
| Corrosion | 5yr/unlimited | 6yr/100k |
| Roadside Assistance | 5yr/60k | 5yr/60k |
Frequently Asked Questions
What is the price difference between the 2026 Ford F-150 Lariat and 2026 GMC Sierra 1500 AT4?
The 2026 Ford F-150 Lariat starts at $63,360, $3,440 less than the 2026 GMC Sierra 1500 AT4 at $66,800. On a 60-month loan that is roughly $60/month. All prices are MSRP before destination and dealer fees.
Who should choose the 2026 Ford F-150 Lariat?
The 2026 Ford F-150 Lariat is the stronger pick when you want to keep $3,440 in your pocket and the 2026 Ford F-150 Lariat covers your needs; you need the extra 95 hp for towing, hauling, or highway merging.
Who should choose the 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 is the stronger pick when lower running costs matter to you, roughly $385/year less on fuel.
Which gets better fuel economy, the 2026 Ford F-150 Lariat or 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 rates 23 combined MPG, 4 MPG ahead.
Which is more powerful, the 2026 Ford F-150 Lariat or 2026 GMC Sierra 1500 AT4?
The 2026 Ford F-150 Lariat produces 400 hp, 95 more than the 2026 GMC Sierra 1500 AT4 at 305 hp. The 2026 Ford F-150 Lariat also leads in torque at 500 lb-ft vs 495 lb-ft. The 2026 Ford F-150 Lariat runs a 3.5L V6 Turbo; the 2026 GMC Sierra 1500 AT4 uses a 3.0L I6 diesel Turbo.
Is the 2026 Ford F-150 Lariat bigger than the 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 is 0.9″ longer at 232.9″ vs 232.0″. The 2026 GMC Sierra 1500 AT4 has a 2.6″ longer wheelbase, which typically means more rear-seat legroom.
How do the warranties compare?
Both offer similar warranty coverage: 3yr/36k bumper-to-bumper and 5yr/60k powertrain.
Explore more: Ford trims, Ford F-150 trims, GMC trims, GMC Sierra 1500 trims
- 2026 Ford F-150 Lariat Safety Ratings (NHTSA)
- 2026 GMC Sierra 1500 AT4 Safety Ratings (NHTSA)
- Compare Fuel Economy (EPA)
How the F-150 and Sierra 1500 Stack Up
Two full-size trucks built for work and weekend. The 2026 Ford F-150 Lariat ($63,360) and 2026 GMC Sierra 1500 AT4 ($66,800) take different approaches to the same job. The $3,440 gap adds up to $60/month on a 60-month loan. That is real money, so the pricier option needs to earn it with capabilities you will actually use.
Powertrain: F-150 vs Sierra 1500
The 2026 Ford F-150 Lariat runs a 3.5L V6 Turbo; the 2026 GMC Sierra 1500 AT4 uses a 3.0L I6 diesel Turbo. The 2026 Ford F-150 Lariat has 95 more hp (400 vs 305). A gap that large affects towing confidence, highway merging, and how loaded the vehicle can feel before it struggles. Both use 4WD.
What It Actually Costs to Own
The 2026 GMC Sierra 1500 AT4 saves roughly $385/year on fuel at $3.50/gallon and 12,000 annual miles. Over five years, that is $1,925.
Size, Space, and Daily Reality
The 2026 GMC Sierra 1500 AT4 weighs 404 lbs more. Heavier vehicles tend to feel more planted at highway speed but use more fuel and are harder to stop quickly.
Which One Should You Buy?
Choose the 2026 Ford F-150 Lariat when you want to keep $3,440 in your pocket and the 2026 Ford F-150 Lariat covers your needs. Choose the 2026 GMC Sierra 1500 AT4 when lower running costs matter to you, roughly $385/year less on fuel. At $60/month more, the 2026 GMC Sierra 1500 AT4 needs to earn that gap with something you use weekly.
Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material. Actual pricing, features, and availability may vary by region and dealer. Always confirm details with an authorized dealer before making a purchase decision. TrimAtlas is not affiliated with Ford or GMC or any dealership.