GMC Sierra 1500 trim comparison
2025 GMC Sierra 1500 Pro vs AT4
The Sierra 1500 Pro starts at $38,300 while the AT4 is $66,800. That $28,500 gap buys 7 meaningful differences.
This is a powertrain and drivetrain change. The AT4 gets the 3.0L I6 diesel Turbo and 4WD, so the $28,500 is buying a different driving experience, not just nicer trim.
Choose the Pro if the 2.7L I4 Turbo with RWD already covers the way you drive. Move to the AT4 only when the 3.0L I6 diesel Turbo and 4WD combo is the reason you are shopping higher, because that is the real hardware split here.
If you are budgeting this move monthly, the jump from the Pro to the AT4 is about $502/month on a 60-month loan at 6.5% APR with 10% down. That works out to roughly $30,120 more by the time interest is counted. The payment only makes sense if that different powertrain matters to the way you actually drive, tow, or live with the vehicle.
Lock one trim, change the other side, and move through exact pair pages without resetting back to the full lineup every time.
Who notices the difference
The higher trim starts to make more sense when you tow, haul, or merge with enough load that the stronger powertrain matters.
When both feel the same
Same platform and drivetrain options on both trims.
The upgrade math
You are paying $28,500 for 6 measurable differences, which works out to about $4,750 per change.
Key Differences at a Glance
This is the fast read: price, power, efficiency, and the feature flips most likely to change the answer.
Every Difference, Side by Side
This is the full read behind the quick decision signals above: the complete hardware, comfort, and equipment story. 7 specification differences, 0 shared.
Full Specification Comparison
Specifications reflect available data as of early 2025. Confirm details with an authorized dealer before purchasing.
| Spec | Pro | AT4 |
|---|---|---|
| Pricing | ||
| MSRP | $38,300 | $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 | RWD | 4WD |
| Fuel Economy | ||
| City MPG | 18 | 21 |
| Highway MPG | 21 | 24 |
| Combined MPG | 19 | 23 |
| Fuel Tank | 24.0 gal | 24.0 gal |
| Dimensions | ||
| Curb Weight | 4,440 lbs | 5,500 lbs |
| Wheelbase | 126.0" | 148.0" |
| Length | 211.0" | 232.9" |
| Width | 81.2" | 81.2" |
| Height | 75.7" | 78.4" |
| Truck Specs | ||
| Cab Type | Regular Cab | Crew Cab |
| Bed Length | No published data | 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 |
Data sources: licensed third-party automotive data, EPA fueleconomy.gov, NHTSA, and official manufacturer materials. Values marked est. are estimated.
2025 GMC Sierra 1500 Pro vs AT4 Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the GMC Sierra 1500 lineup, the GMC brand hub, the Full-Size Trucks, the how to pick a trim guide, or our mid-trim value research when you need the bigger shopping path behind this one matchup.
How much more does the 2025 Sierra 1500 AT4 cost than the Pro?
The AT4 starts at $66,800 compared to $38,300 for the Pro (both Regular Cab RWD). That is a $28,500 difference, or approximately $502/month more on a 60-month loan.
Do the 2025 GMC Sierra 1500 Pro and AT4 have the same engine?
No. The Pro uses a 2.7L I4 Turbo (310 hp, 430 lb-ft), while the AT4 has the 3.0L I6 diesel Turbo (305 hp, 495 lb-ft). Both pair with the same 8-speed shiftable automatic.
Does the 2025 Sierra 1500 Pro come with 4WD?
No. The Pro comes standard with RWD while the AT4 has 4WD. This affects traction, fuel economy, and curb weight.
Is the 2025 Sierra 1500 Pro or AT4 safer?
Both share the same GMC Sierra 1500 platform with an overall 5-star NHTSA safety rating. Safety ratings are model-level and identical across trims. The trim choice affects comfort and features, not crash protection.
What warranty does the 2025 GMC Sierra 1500 come with?
All 2025 GMC Sierra 1500 trims, including both the Pro and AT4, come with GMC's standard warranty: 3yr/36k bumper-to-bumper and 5yr/60k powertrain coverage. Warranty does not vary by trim level.
Is the 2025 GMC Sierra 1500 AT4 worth $28,500 more than the Pro?
The AT4 changes both the engine and drivetrain for $28,500 more. That is a hardware upgrade, not just a feature bump.
Which 2025 GMC Sierra 1500 trim gets better fuel economy, the Pro or the AT4?
The AT4 is the more efficient of the two at 23 combined MPG, versus 19 for the other trim. That matters most if you are balancing running costs against the extra power, drivetrain, or comfort equipment tied to the pricier trim.
The Full Story Behind This Price Gap
Use the direct answer above for this exact matchup, then use these guides to understand whether you are really looking at a feature step-up, a package shuffle, or the point where the lineup starts changing in a meaningful way.
What $28,500 Gets You
The Sierra 1500 AT4 costs $28,500 more than the Pro. Whether that is worth it depends on how much you value the 3.0L I6 diesel Turbo engine (+-5 hp) and 4WD. Power and comfort matter differently to different buyers. Weigh them against your priorities.
Pro vs. AT4: Day-to-Day
The AT4 runs a 3.0L I6 diesel Turbo instead of the Pro's 2.7L I4 Turbo. That means -5 more horsepower and 65 more lb-ft of torque. Noticeable when merging or hauling, less so around town. The AT4 adds 4WD, giving it better traction for towing in wet conditions, gravel roads, and winter driving. Expect slightly lower fuel economy and higher curb weight.
Fuel Economy Comparison
The Sierra 1500 AT4 gets 4 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $385 per year or $1,925 over five years of ownership.
Summary
$28,500 more for the Sierra 1500 AT4 gets you 6 real differences. At $502/month more, the question is whether those specific changes are things you will use regularly.
Trim-Matched Accessories
These add-ons are split by trim intent so the recommendations follow the actual use case, not just the same repeated product block.
GMC Sierra 1500 Pro
Value-trim add-onsThese picks fit the Pro best when the goal is covering the daily-use gaps without paying up to the next trim.
GMC Sierra 1500 AT4
Step-up trim add-onsThese picks suit the AT4 when you want the accessories to match the nicer cabin, broader utility, or more premium use case.
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Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material for the 2025 model year. 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 GMC or any dealership.
Page updated 2026-03-18. Verify equipment, pricing, and regional availability with the manufacturer or dealer.