Quick Facts:
- Topic: 2027 Sierra HD price for every trim, gas and diesel.
- Starting price: $57,495 for a gas Pro, 2500HD Crew Cab 4WD.
- Diesel option: $11,400, up $1,410 from the outgoing $9,990 charge.
- Typical diesel increase: $2,310 over the 2026 truck.
- Diesel only trim: Denali Ultimate at $99,395, up $2,400.
- Most expensive: AT4X diesel at $100,595.
- New diesel output: 555 hp and 1,230 lb-ft, per GM.
- Not stated: destination charge and bed length.
- Arrival: late 2026, per GM.
 5 min read
In This Article
Overview
The 2027 Sierra HD price starts at $57,495 for a gas Pro and reaches $100,595 for a diesel AT4X, based on figures GM supplied on October 6, 2026. Diesel trims start at $68,895 with the Pro. Those numbers cover the 2500HD Crew Cab 4WD only, so 3500HD prices are not covered here. Each gas trim gains $900, while the new diesel adds $11,400 on top.
Compared to the outgoing $9,990 diesel charge in GM’s own comparison, the new engine costs $1,410 more. Add the $900 gas increase, and most diesel trims then rise $2,310 over 2026. Denali Ultimate comes only with diesel and rises $2,400. Therefore, you need to track two separate numbers in your budget.
GM expects the trucks at dealers late in 2026. For half-ton shoppers, our 2027 GMC Sierra 1500 price guide covers the smaller truck. Below, you get every HD trim, a diesel comparison with Ford and Ram, and a plan for ordering or waiting.
If you plan to run the 35-inch Goodyear Territory MT tires on an AT4X, you need a way to air down on the trail and air back up before the highway. The VIAIR 400P/40043 12V Portable Air Compressor is rated by its maker for off-road tires up to 35 inches, the BOULDER TOOLS Adjustable Automatic Tire Deflator 80 PSI Air Down Kit sets your trail pressure on all four tires, and the Rhino USA Recovery Tow Strap 3in x 30ft gives you a rated pull for a stuck full-size truck. Buy this gear before the truck arrives so your first trip is ready.
Air and recovery gear for 35-inch tires
2027 Sierra HD Price by Trim
GM supplied MSRPs for six gas trims and seven diesel trims. All figures also cover the 2500HD Crew Cab 4WD. However, the material does not say whether destination is included, and it does not name the bed length.
| Trim | 2027 gas | 2027 diesel | 2026 diesel | Diesel change |
|---|---|---|---|---|
| Pro | $57,495 | $68,895 | $66,585 | +$2,310 |
| SLE | $61,895 | $73,295 | $70,985 | +$2,310 |
| SLT | $69,195 | $80,595 | $78,285 | +$2,310 |
| AT4 | $76,195 | $87,595 | $85,285 | +$2,310 |
| Denali | $78,895 | $90,295 | $87,985 | +$2,310 |
| AT4X | $89,195 | $100,595 | $98,285 | +$2,310 |
| Denali Ultimate | Not offered | $99,395 | $96,995 | +$2,400 |
The diesel AT4X crosses $100,000 at $100,595. Notably, this price sits $1,200 above the diesel-only trim at $99,395, which makes the diesel AT4X the most expensive Sierra HD on GM’s list.
Each truck also carries a different diesel share. For example, $11,400 equals about 20 percent of the gas Pro, about 15 percent of the AT4 and about 13 percent of the AT4X. As a result, the diesel upgrade adds the largest share to the cheapest trims.
Where the $2,310 Increase Comes From
Two changes stack together. First, every gas trim rises $900. Next, the new diesel costs $1,410 more than the L5P it replaces, for a total of $2,310. Since the diesel-only trim has no gas version, GM lists its full $2,400 jump as a diesel price change.
The extra money buys output. GM rates the 8.3L Duramax at 555 hp and 1,230 lb-ft. The outgoing L5P made 470 hp and 975 lb-ft, according to GM Authority. In total, the new engine adds 85 hp and 255 lb-ft, or about $17 for each added horsepower over the L5P. The $21 figure in the comparison below divides the full $11,400 instead.
Gas buyers also get a better standard 6.6L V8, with 412 hp and 472 lb-ft per GM. For the full engine story, including the hardware, read our 8.3L Duramax announcement breakdown and GM’s heavy-duty release.
GM’s official video below covers the new 8.3L Duramax Turbo-Diesel V8 behind the $11,400 option.
Sierra HD Diesel vs. Ford and Ram Options
GM undercuts both rivals on the diesel option. Ford’s 6.7L High-Output Power Stroke shows a $12,495 option price on a 2027 F-250 XLT listing, and Ram’s 6.7L High-Output Cummins shows $12,995, according to TFLtruck and Pickup Truck+SUV Talk. As a result, the GM diesel costs $1,095 less than Ford’s and $1,595 less than Ram’s on those listed prices.
| Diesel option | Option price | Output | Cost per hp |
|---|---|---|---|
| GM 8.3L V8 | $11,400 | 555 hp, 1,230 lb-ft | About $21 |
| Ford 6.7L Power Stroke HO | $12,495 | 500 hp, 1,200 lb-ft | About $25 |
| Ram 6.7L Cummins HO | $12,995 | 430 hp, 1,075 lb-ft | About $30 |
The cost per hp column divides each option price by its rated horsepower, so treat it as a rough comparison. Ford and Ram option prices vary by trim and package, and each maker builds its trims and standard engines differently. Our Ram Power Wagon Cummins diesel story covers the Ram side in more detail.
Chevrolet sells the same engine for $11,400, according to GM Authority. Its Silverado HD 2500 base prices also rose $1,000 to $1,500, compared with $900 on Sierra HD gas trims. However, cab and drive layouts differ between the two lists, so compare the direction, not the dollars.
What the 2027 Sierra HD Price Means for You
First, consider your towing habits. The gas V8 makes 412 hp and 472 lb-ft, so match it to your loaded camper weight. If you pull near your truck’s rating every week, the diesel justifies its $11,400 price. Otherwise, if you tow twice a year, the gas truck saves the money.
For camper and trailer loads, the Sherline LM-5000 Trailer Tongue Weight Scale reads tongue weight up to 5000 pounds, the TST 507 Series TPMS with 6 Cap Sensors watches each trailer or camper tire for low pressure and heat, and the MaxxHaul Rubber Wheel Chock 2 Pack holds a loaded rig in place once you park.
Towing and truck camper prep gear
Leftover trucks matter too. Unsold 2026 trucks with the L5P carry MSRPs $2,310 lower on most diesel trims in the table above, though they make 85 hp less. Dealers set real discounts, and our piece on GM retiring the L5P Duramax weighs a leftover against waiting for the new engine.
Off-road buyers should study the AT4X. GMC lists a factory 1.5-inch lift, Multimatic DSSV dampers, a rear electronic locker and 35-inch Goodyear Territory MT tires. In addition, Terrain Mode adds one-pedal driving in 4HI and 4LO. The gas AT4X costs $89,195, a $13,000 premium over the gas AT4, and the diesel AT4X costs $100,595, the same $13,000 over the diesel AT4.
Treat every figure as MSRP. Dealers set final prices, options add more, and GM’s material leaves out destination and bed length. Payload and fuel economy for the new diesel are also missing from the pricing sources we reviewed, so truck camper owners should get the payload rating from the dealer in writing before signing an order.
Final Thoughts
The 2027 Sierra HD price shows two changes. Gas trims rose $900, and GM charged $1,410 more for a diesel with 85 more horsepower and 255 more lb-ft. For the added cost, I think the 8.3L is fairly priced next to Ford and Ram.
If you tow heavy loads, I would order the diesel and get the payload rating in writing before you sign. In contrast, if you mostly drive and tow lightly, the gas truck gives you plenty of truck for $11,400 less.
Whichever you choose, ask each dealer for the destination charge and bed length in writing. Then compare itemized quotes from more than one store, because the final sticker will differ from these MSRPs.
FAQ
How much does the 2027 Sierra HD cost?
GM’s supplied MSRPs for the 2500HD Crew Cab 4WD run from $57,495 for a gas Pro to $100,595 for a diesel AT4X. The diesel-only trim costs $99,395.
How much is the 8.3L diesel option?
Compared to the outgoing 6.6L diesel at $9,990, it costs $11,400, which is $1,410 more.
Which Sierra HD trim comes only with diesel?
Denali Ultimate has no gas version. GM lists it at $99,395 for 2027, up from $96,995.
Does the 2027 Sierra HD price include destination?
GM’s pricing material does not say. Ask your dealer for the destination charge and bed length in writing before you compare quotes.
When does the 2027 Sierra HD reach dealers?
GM expects the truck at dealers late in 2026. Your dealer will confirm allocation and delivery timing.
Related Reading