GMC Yukon XL trim comparison
2024 GMC Yukon XL SLT vs AT4
The Yukon XL SLT starts at $67,900 while the AT4 is $74,505. That $6,605 gap buys 4 meaningful differences.
The AT4 adds 4WD instead of RWD. If you deal with winter roads or need traction off-pavement, that could be worth $6,605 by itself. If not, the SLT saves you the money.
Stay with the SLT if RWD already works for your weather and routine. Move to the AT4 only when 4WD changes the way you will actually use the vehicle.
If you are budgeting this move monthly, the jump from the SLT to the AT4 is about $116/month on a 60-month loan at 6.5% APR with 10% down. That works out to roughly $6,960 more by the time interest is counted. So the call is less about the raw price gap and more about whether 4WD matters for where and how you drive versus RWD.
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 extra traction matters for your weather, roads, or weekend use.
When both feel the same
Both the SLT and AT4 share the same 10-speed shiftable automatic transmission and identical wheelbase and body dimensions.
The upgrade math
You are paying $6,605 for 3 measurable differences, which works out to about $2,202 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. 4 specification differences, 3 shared.
Full Specification Comparison
Specifications reflect available data as of early 2024. Confirm details with an authorized dealer before purchasing.
| Spec | SLT | AT4 |
|---|---|---|
| Pricing | ||
| MSRP | $67,900 | $74,505 |
| Powertrain | ||
| Engine | 5.3L V8 | 5.3L V8 |
| Horsepower | 355 hp | 355 hp |
| Torque | 383 lb-ft | 383 lb-ft |
| Transmission | 10-speed shiftable automatic | 10-speed shiftable automatic |
| Drivetrain | RWD | 4WD |
| Fuel Economy | ||
| City MPG | 15 | 15 |
| Highway MPG | 20 | 18 |
| Combined MPG | 17 | 16 |
| Fuel Tank | 28.0 gal | 28.0 gal |
| Dimensions | ||
| Curb Weight | 5,633 lbs | 5,841 lbs |
| Wheelbase | 134.0" | 134.0" |
| Length | 225.2" | 225.2" |
| Width | 81.0" | 81.0" |
| Height | 76.5" | 76.5" |
| Safety | ||
| NHTSA Overall | 4/5 stars | 4/5 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.
2024 GMC Yukon XL SLT vs AT4 Questions Shoppers Ask
Use this page for the direct trim answer, then zoom back out to the GMC Yukon XL lineup, the GMC brand hub, the Full-Size SUVs, 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 2024 Yukon XL AT4 cost than the SLT?
The AT4 starts at $74,505 compared to $67,900 for the SLT. That is a $6,605 difference, or approximately $116/month more on a 60-month loan.
Do the 2024 GMC Yukon XL SLT and AT4 have the same engine?
Yes. Both use the 5.3L V8 producing 355 hp and 383 lb-ft of torque. The engine hardware does not change between these trims, so the real differences are in equipment and feature content.
Does the 2024 Yukon XL SLT come with 4WD?
No. The SLT comes standard with RWD while the AT4 has 4WD. This affects traction, fuel economy, and curb weight.
Is the 2024 Yukon XL SLT or AT4 safer?
Both share the same GMC Yukon XL platform with an overall 4-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 2024 GMC Yukon XL come with?
All 2024 GMC Yukon XL trims, including both the SLT 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 2024 GMC Yukon XL AT4 worth $6,605 more than the SLT?
The $6,605 adds 4WD. Worth it if you need the traction. Not worth it if you drive on dry roads year-round.
Which 2024 GMC Yukon XL trim gets better fuel economy, the SLT or the AT4?
The SLT is the more efficient of the two at 17 combined MPG, versus 16 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 $6,605 Gets You
The Yukon XL AT4 costs $6,605 more than the SLT. Whether that is worth it depends on how much you value 4WD. These features matter to some buyers daily and barely at all to others. Weigh them against your priorities.
SLT vs. AT4: Day-to-Day
The AT4 includes 4WD, which adds confidence in rain, snow, and light off-road conditions. It also increases curb weight and slightly reduces fuel economy.
Fuel Economy Comparison
The Yukon XL SLT gets 1 more combined MPG. At $3.50/gallon and 12,000 miles/year, that saves roughly $154 per year or $770 over five years of ownership.
What Both Trims Share
Despite the differences above, the SLT and AT4 share engine and transmission, keeping the core Yukon XL experience consistent across trims.
Summary
$6,605 more for the Yukon XL AT4 gets you 3 real differences. At $116/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 Yukon XL SLT
Value-trim add-onsThese picks fit the SLT best when the goal is covering the daily-use gaps without paying up to the next trim.
GMC Yukon XL 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 2024 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.