2026 Chevrolet Silverado 1500 LT vs 2026 GMC Sierra 1500 AT4
$13,200 less vs 15 MPG better and 65 more lb-ft torque. That is the real fork. Key numbers: $13,200 price gap, 310 vs 305 hp, 8 vs 23 MPG.
The Silverado 1500 LT leads on $13,200 less. The Sierra 1500 AT4 leads on 15 MPG better, 65 more lb-ft torque. The spec table compares 5 specifications head to head.
Key Differences at a Glance
What's Actually Different
These two vehicles differ in 5 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 Chevrolet Silverado 1500 LT | 2026 GMC Sierra 1500 AT4 |
|---|---|---|
| Pricing | ||
| MSRP | $53,600 | $66,800 |
| Powertrain | ||
| Engine | 2.7L I4 Turbo | 3.0L I6 diesel Turbo |
| Horsepower | 310 hp | 305 hp |
| Torque | 430 lb-ft | 495 lb-ft |
| Transmission | 8-speed shiftable automatic | 10-speed shiftable automatic |
| Drivetrain | 4WD | 4WD |
| Fuel Economy | ||
| City MPG | 17 | 21 |
| Highway MPG | 20 | 24 |
| Combined MPG | 8 | 23 |
| Fuel Tank | 24.0 gal | 24.0 gal |
| Dimensions | ||
| Curb Weight | 4,950 lbs | 5,500 lbs |
| Wheelbase | 147.4" | 148.0" |
| Length | 231.9" | 232.9" |
| Width | 81.2" | 81.2" |
| Height | 75.5" | 78.4" |
| Truck Specs | ||
| Cab Type | Crew Cab | Crew Cab |
| Bed Length | 5.8 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 | 6yr/100k | 6yr/100k |
| Roadside Assistance | 5yr/60k | 5yr/60k |
Frequently Asked Questions
What is the price difference between the 2026 Chevrolet Silverado 1500 LT and 2026 GMC Sierra 1500 AT4?
The 2026 Chevrolet Silverado 1500 LT starts at $53,600, $13,200 less than the 2026 GMC Sierra 1500 AT4 at $66,800. On a 60-month loan that is roughly $232/month. All prices are MSRP before destination and dealer fees.
Who should choose the 2026 Chevrolet Silverado 1500 LT?
The 2026 Chevrolet Silverado 1500 LT is the stronger pick when you want to keep $13,200 in your pocket and the 2026 Chevrolet Silverado 1500 LT covers your needs.
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 $3,424/year less on fuel; 65 lb-ft more torque for pulling trailers and heavy loads.
Which gets better fuel economy, the 2026 Chevrolet Silverado 1500 LT or 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 rates 23 combined MPG, 15 MPG ahead.
Which is more powerful, the 2026 Chevrolet Silverado 1500 LT or 2026 GMC Sierra 1500 AT4?
The 2026 Chevrolet Silverado 1500 LT produces 310 hp, 5 more than the 2026 GMC Sierra 1500 AT4 at 305 hp. The 2026 GMC Sierra 1500 AT4 also leads in torque at 495 lb-ft vs 430 lb-ft. That torque gap matters most when towing or hauling heavy loads. The 2026 Chevrolet Silverado 1500 LT runs a 2.7L I4 Turbo; the 2026 GMC Sierra 1500 AT4 uses a 3.0L I6 diesel Turbo.
Is the 2026 Chevrolet Silverado 1500 LT bigger than the 2026 GMC Sierra 1500 AT4?
The 2026 GMC Sierra 1500 AT4 is 1.0″ longer at 232.9″ vs 231.9″. The 2026 GMC Sierra 1500 AT4 has a 0.6″ 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: Chevrolet trims, Chevrolet Silverado 1500 trims, GMC trims, GMC Sierra 1500 trims
Silverado 1500 vs Sierra 1500: What This Matchup Is Really About
The 2026 Chevrolet Silverado 1500 LT and 2026 GMC Sierra 1500 AT4 compete directly in the full-size truck segment, where towing capacity, payload, and cab comfort separate the contenders. The $13,200 gap adds up to $232/month on a 60-month loan. That is real money, so the pricier option needs to earn it with capabilities you will actually use.
Under the Hood
The 2026 Chevrolet Silverado 1500 LT runs a 2.7L I4 Turbo; the 2026 GMC Sierra 1500 AT4 uses a 3.0L I6 diesel Turbo. The 5 hp difference (310 vs 305) is marginal in daily driving. The 2026 GMC Sierra 1500 AT4 also delivers 65 more lb-ft of torque (495 vs 430), which matters for trailer stability and pulling heavy loads up grades. Both use 4WD.
Running Costs: Silverado 1500 vs Sierra 1500
The 2026 GMC Sierra 1500 AT4 saves roughly $3,424/year on fuel at $3.50/gallon and 12,000 annual miles. Over five years, that is $17,120. The 2026 GMC Sierra 1500 AT4 costs more upfront but recovers some of that gap through lower running costs. At $3,424/year in savings, it takes about 3.9 years to close the $13,200 sticker difference.
How Each One Fits Your Daily Life
The 2026 GMC Sierra 1500 AT4 weighs 550 lbs more. Heavier vehicles tend to feel more planted at highway speed but use more fuel and are harder to stop quickly.
Bottom Line
Choose the 2026 Chevrolet Silverado 1500 LT when you want to keep $13,200 in your pocket and the 2026 Chevrolet Silverado 1500 LT covers your needs. Choose the 2026 GMC Sierra 1500 AT4 when lower running costs matter to you, roughly $3,424/year less on fuel. At $232/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 Chevrolet or GMC or any dealership.