2027 Silverado HD 8-3L Duramax

Knudtsen Chevrolet› Blog› 8.3L Duramax vs 6.6L Gas: Which 2027 Silverado HD Engine Fits You Choose the 8.3L Duramax if you pull a fifth-wheel or gooseneck heavier than about 19,000 pounds, or tow long distances often; choose the 6.6L gas V8 if most of your weight rides in the bed, behind a plow or on a lighter bumper-pull trailer. The diesel costs $11,400 more on any 2027 Silverado 2500 HD. This guide walks through the numbers and the real-world jobs we hear about from truck buyers at Knudtsen Chevrolet in Post Falls. For background on each engine, read our 8.3L Duramax breakdown and our look at the updated 6.6L gas V8. The Silverado HD overview covers the rest of the truck. $11,400 Diesel option, any 2500 HD trim 20,000 lbs Diesel max conventional towing 19,000 lbs Gas max towing 6,990 lbs Gas max payload rating New Inventory Pre-owned Inventory New Vehicle Specials Contact Us Diesel or gas: what's the quick answer? Let the trailer decide. If it hitches in the bed and weighs more than the gas truck's 19,000-pound maximum, you need the diesel. Below that, the gas V8 is a legitimate choice and often the better value. Lean diesel if you... Pull a large fifth-wheel camper or a gooseneck stock or equipment trailer, put long highway miles on with a load, want the most torque for mountain grades, or need a dually rated for 30,000 pounds or more. Lean gas if you... Run a plow, carry heavy loads in the bed, tow a bumper-pull trailer a few weekends a year, or want the lowest purchase price on the trim you like. How do diesel and gas towing ratings compare? The gas V8's overall maximum of 19,000 pounds sits just 1,000 pounds under the diesel's conventional-hitch maximum of 20,000. The diesel pulls away with a gooseneck, where GM rates it up to 38,000 pounds. Rating 8.3L Duramax 6.6L gas V8 Max towing, any hitch 38,000 lbs (gooseneck) 19,000 lbs Max towing, conventional hitch 20,000 lbs Not published separately Max GCWR 46,500 lbs (select configs) Not yet released Dual-rear-wheel trucks 30,000+ lbs, every diesel dually Not yet released That's why we don't compare 38,000 to 19,000 as if they were the same kind of rating. Most buyers towing a bumper-pull trailer under 19,000 pounds are choosing between two engines that can both do the job, and the question becomes how the truck feels doing it and what it costs. Towing ratings for each 2500 HD and 3500 HD cab, bed, axle and drivetrain combination are not yet released. Every number above is a maximum for a properly equipped truck. Which engine has the higher maximum payload rating? Chevrolet's top payload rating is 6,990 pounds with the gas V8 and 6,170 pounds with the diesel, an 820-pound spread between the best configurations of each. That gap only tells you where the ceiling sits. Two specific trucks can land anywhere relative to each other depending on cab, bed and drivetrain, so the label on the door jamb is the number that counts. Still, if you load gravel, pallets or a slide-in camper more often than you hitch up, start your search with gas and let the label confirm it. Is the diesel worth $11,400? It is if you need the gooseneck rating or tow heavy on a regular schedule. For a WT, $11,400 is about 23% of the $49,995 starting price, which is a lot of money for capability you may use twice a year. The premium is flat across all six 2500 HD trims, from WT to High Country. If you'd rather spend that money on a nicer cab, compare the trims on our 2027 Silverado HD trim levels page before you settle on an engine. Fuel economy for both engines and the warranty terms for the 8.3L Duramax are not yet released, so a full cost-of-ownership comparison isn't possible yet. We'll add it when GM publishes the figures. Which engine fits common North Idaho jobs? Here's how we'd match each engine to common jobs we hear about, based on the published ratings. Job Our pick Why Big fifth-wheel camper over Fourth of July Pass 8.3L Duramax Highest towing ratings, 1,230 lb-ft for the climb, upgraded exhaust braking for the descent Gooseneck horse or stock trailer 8.3L Duramax Up to 38,000 lbs gooseneck on properly equipped trucks Equipment trailer, bumper-pull, under 19,000 lbs Either Gas max of 19,000 lbs vs diesel conventional max of 20,000 lbs Snow plow truck 6.6L gas Lower purchase price; confirm front axle rating with us Contractor hauling in the bed 6.6L gas Higher maximum payload rating Occasional boat or travel trailer 6.6L gas Plenty of capability without the $11,400 option Does the engine change anything else about the truck? Less than you'd think. Both engines run through an Allison 10-speed automatic, and GM's new electric power steering and eBoost brakes with 14.6-inch front rotors are part of the 2027 HD lineup regardless of what's under the hood. GM lists the trailering camera system, with up to 14 views including Transparent Trailer View, and trailer tire pressure and temperature monitoring as available on the 2027 HD without tying them to one engine. Gas trucks get a standard oil-level readout on the driver display. Diesels get GM's upgraded exhaust braking, which is the one feature here you'll appreciate most on I-90 heading down Lookout Pass with a full trailer. Get help choosing at Knudtsen Chevrolet Bring your trailer's weight and hitch type and we'll match you to the right engine and configuration. Shop new 2027 Silverado 2500 HD inventory or contact our Post Falls truck team with your numbers. Frequently Asked Questions Should I get the diesel or gas 2027 Silverado HD? Get the 8.3L Duramax for heavy fifth-wheel or gooseneck towing and frequent long tows. Get the 6.6L gas V8 for bed loads, plow duty or bumper-pull trailers under 19,000 pounds. How much more does the diesel Silverado HD cost? The 8.3L Duramax is an $11,400 option on every 2027 Silverado 2500 HD trim. A diesel WT comes to $61,395 including destination. Can the gas Silverado HD tow a fifth-wheel? It can tow up to 19,000 pounds when properly equipped. Heavier fifth-wheels and goosenecks call for the diesel, which GM rates up to 38,000 pounds with a gooseneck. Which Silverado HD engine has more payload? The gas V8 has the higher maximum payload rating, 6,990 pounds versus 6,170 pounds for the diesel. Payload for a specific truck depends on its configuration. Do the diesel and gas Silverado HD use the same transmission? Yes. Both are paired with an Allison 10-speed automatic.

Knudtsen Chevrolet› Blog› The 2027 Silverado HD 6.6L Gas V8: What's New and Who Should Buy It The 6.6L gas V8 is the standard engine on every 2027 Silverado 2500 HD trim, and it now makes 412 horsepower and 472 lb-ft of torque. It carries the highest maximum payload rating in the lineup, 6,990 pounds, and choosing it keeps $11,400 in your pocket compared with the diesel. For plenty of buyers we talk to at Knudtsen Chevrolet in Post Falls, that's the smarter truck. The 2027 Silverado HD overview covers both engines and the rest of the truck, and the HD trim levels page shows what each of the six trims includes. 412 hp Up from 401 for 2026 472 lb-ft Up from 464 for 2026 6,990 lbs Max payload rating (gas) 19,000 lbs Max towing (gas) New Inventory Pre-owned Inventory New Vehicle Specials Contact Us What changed on the 6.6L gas V8 for 2027? It gained 11 horsepower and 8 lb-ft, and GM reworked the intake, oiling and emissions hardware. GM's stated goal was better pull at low engine speeds, which is where a work truck spends most of its life. New Turbo-Jet intake manifold Revised lubrication system Engine-mounted oil cooler Updated emissions hardware Standard oil level sensor Oil level shown on the driver display GM rates 472 lb-ft as best-in-class standard torque among 2027 heavy-duty gas engines. Of the updates, the digital oil readout is the one owners will notice every week: you can check the level from the driver's seat. Is it the same 6.6L as the Silverado 1500? No. Edmunds reports the HD's 6.6L is a different engine from the 6.6L V8 offered in the light-duty Silverado 1500, even though they share a displacement. The HD gas V8 is assembled in Tonawanda, New York, and it's paired with an Allison 10-speed automatic. If you're cross-shopping and wondering whether a half-ton would do the job, our 2027 Silverado 1500 overview is a good place to compare. Once your trailers or bed loads push past what a 1500 is built for, the HD is where you belong. How does the gas V8 compare with the 8.3L Duramax? The diesel makes more power and tows more; the gas engine carries the higher maximum payload rating and costs $11,400 less. Here are the published numbers: 6.6L gas V8 8.3L Duramax Horsepower 412 555 Torque (lb-ft) 472 1,230 Max towing (lbs) 19,000 20,000 conventional / 38,000 gooseneck Max payload rating (lbs) 6,990 6,170 Added cost (2500 HD) Standard $11,400 Read the payload row carefully. Those are the best ratings Chevrolet lists for each engine across all configurations, not a guarantee that any given gas truck out-carries any given diesel. Look at the 19,000 and 20,000 figures side by side, too: on a bumper-pull trailer the two engines are closer than the headline 38,000 suggests. For the full story on the diesel, see our 8.3L Duramax explainer. How much does a gas 2027 Silverado HD cost? A gas 2500 HD starts at $49,995 for the WT, including the $2,795 destination charge. Every trim comes with the gas V8 standard, so the gap to a diesel is the same $11,400 all the way up. 2500 HD trim 6.6L gas, with destination 8.3L diesel, with destination WT $49,995 $61,395 Custom $53,295 $64,695 LT $56,695 $68,095 LTZ $67,695 $79,095 ZR2 $77,695 $89,095 High Country $78,195 $89,595 One way to look at it: the diesel premium is more than the difference between a WT and an LT. A gas LT, two trims up, still costs less than a diesel WT. Prices are announced 2500 HD figures reported by Autoblog, TFLtruck and CarBuzz. 3500 HD pricing is not yet released, and fuel economy for either engine hasn't been published. Who should buy the gas V8? Buyers whose weight rides in the bed or on a bumper-pull trailer under 19,000 pounds. Here's who we'd steer toward gas. Plow trucks A North Idaho plow truck earns its keep in winter. Put the $11,400 toward the blade and the install, and check the truck's front axle rating with us before you order. Bed-heavy work Contractors hauling tools, materials or a slide-in tank can start from the higher maximum payload rating, then confirm the number on the door label. Weekend towing A boat, a car hauler or a mid-size travel trailer a few times a year doesn't need 1,230 lb-ft. A gas Custom or LT handles it and costs less up front. Budget-first buyers If the payment matters most, gas lets you step up a trim, add the Trail Boss package on the Custom, or simply spend less. If you tow a big fifth-wheel or a gooseneck, that's diesel territory. We'll compare the two engines head to head in an upcoming post. Find a gas 2027 Silverado HD GM expects 2027 Silverado HD trucks at dealers beginning late 2026. Browse new 2027 Silverado 2500 HD trucks at Knudtsen or ask our Post Falls sales team to match a trim and configuration to your payload and trailer. Frequently Asked Questions How much horsepower does the 2027 Silverado HD gas engine have? The 6.6L gas V8 makes 412 horsepower and 472 lb-ft of torque, up from 401 horsepower and 464 lb-ft for 2026. How much can a gas 2027 Silverado HD tow? Chevrolet lists maximum towing of 19,000 pounds with the 6.6L gas V8. Ratings for each configuration have not been released, so check the specific truck. Does the gas Silverado HD have more payload than the diesel? Its maximum payload rating is higher, 6,990 pounds versus 6,170 pounds for the diesel. Those are maximums across configurations, so actual payload depends on the truck you buy. Is the HD 6.6L gas V8 the same engine as in the Silverado 1500? No. Edmunds reports it's a different engine from the light-duty Silverado 1500's 6.6L V8. The HD version is assembled in Tonawanda, New York. What transmission does the gas Silverado HD use? Chevrolet lists an Allison 10-speed automatic with the 6.6L gas V8.

Editor notes (do not publish) URL slug: /blog/2027-silverado-hd-what-changed Publish date: 2026-11-12 (update datePublished in the schema if it goes live on another day) CMS post title (this is the post's H1; the body has no H1 to avoid a double H1): 2027 Silverado HD: Everything That Changed Meta title: 2027 Silverado HD: Everything That Changed Meta description: New 8.3L Duramax, stronger gas V8, electric steering, eBoost brakes and new prices: what changed on the 2027 Silverado HD, from Knudtsen in Post Falls. Last verified: November 3, 2026. Re-check prices on chevrolet.com before publishing. Update when released: Add 3500 HD pricing, per-configuration towing and payload, cab/bed configurations, 8.3L warranty terms, Trail Boss package pricing and LT/LTZ Trail Boss availability, and confirm 2500 HD MSRP once Chevrolet.com posts it. Images to download, rename and upload to /static/dealer-28512/SEO/: /static/dealer-28512/SEO/2027-Chevrolet-Silverado-HD-Hero.png from https://www.chevrolet.com/content/dam/chevrolet/na/us/english/index/trucks/2027-silverado-hd/page-assets/mh/27-silverado-hd-mh-xs-01.png ; /static/dealer-28512/SEO/2027-Chevrolet-Silverado-HD-Capability.png from https://www.chevrolet.com/content/dam/chevrolet/na/us/english/index/trucks/2027-silverado-hd/page-assets/capability/27-silverado-hd-capability-xs-01-v021.png ; Confirm image usage rights. Sources: https://news.gm.com/home.detail.html/Pages/news/us/en/2026/sep/0924-heavy-duty-duramax-83l-turbo-diesel-v8-engine.html ; https://www.chevrolet.com/upcoming-vehicles/2027-silverado-hd ; https://www.chevrolet.com/trucks/silverado/2500hd-3500hd ; https://www.edmunds.com/car-news/2027-chevy-silverado-gmc-sierra-heavy-duty-duramax-diesel.html ; https://www.autoblog.com/news/2027-chevy-silverado-hd-prices-rise-across-the-lineup ; https://tfltruck.com/2026/10/news-2027-chevy-silverado-hd-we-have-official-8-3l-duramax-diesel-pricing-its-better-than-we-thought/ ; https://carbuzz.com/2027-chevrolet-silverado-2500-hd-pricing/ Knudtsen Chevrolet› Blog› 2027 Silverado HD: Everything That Changed The 2027 Silverado HD looks almost the same as the truck it replaces, but the engine choices, the steering and the brakes are all new. There's an 8.3L Duramax diesel, a stronger 6.6L gas V8, electric power steering and an electronic brake booster, and 2500 HD prices went up $1,000 to $1,500 depending on trim. Here's what's different, what isn't, and what Chevrolet still hasn't told us, from the heavy-duty team at Knudtsen Chevrolet in Post Falls. Want the full model rundown first? Our 2027 Chevrolet Silverado HD overview covers the whole lineup, and the Silverado HD trim levels guide lays out all six trims side by side. 555 hp New 8.3L Duramax diesel 412 hp Updated 6.6L gas V8 38,000 lbs Max towing (gooseneck, diesel) $1,000 to $1,500 2500 HD price increase by trim New Inventory Pre-owned Inventory New Vehicle Specials Contact Us Does the 2027 Silverado HD look different? Not much. Chevrolet itself says the outside may look familiar, and Edmunds reports the sheetmetal and the interior both carry over from the current truck. That's a deliberate choice. GM spent its money on the hardware that pulls, steers and stops, which is where an HD owner feels the difference with a heavy trailer hooked up. If you're trading in a recent Silverado HD, the cab will feel like home. Chevrolet lists a 13.4-inch touchscreen, a 12.3-inch driver display, available Google built-in with the Gemini assistant, and eight years of standard OnStar Basics. What replaced the 6.6L Duramax diesel? An 8.3L Duramax turbo-diesel V8 making 555 horsepower and 1,230 lb-ft of torque replaces the 6.6L Duramax, which made 470 horsepower and 975 lb-ft in the 2026 truck. That's 85 more horsepower and 255 more lb-ft. GM calls it its first clean-sheet heavy-duty V8 designed, developed and manufactured in-house, and rates its horsepower and torque best-in-class among diesels (GM's claim excludes other GM vehicles, since the GMC Sierra HD gets the same engine). It's built at GM's DMAX plant in Brookville, Ohio, and it's paired with an Allison 10-speed automatic. Maximum towing climbs from 36,000 pounds on the 2026 HD to 38,000 pounds with a gooseneck. The diesel is a $11,400 option on every 2500 HD trim. We'll go through the engine part by part in next week's post. Is the gas engine new too? The 6.6L gas V8 isn't all-new, but it's stronger: 412 horsepower and 472 lb-ft, up from 401 and 464. GM rates that 472 lb-ft as best-in-class standard torque among 2027 heavy-duty gas engines. The updates are mostly about durability and pulling from low rpm. There's a new intake manifold, a reworked lubrication system with an engine-mounted oil cooler, updated emissions hardware and a digital oil-level readout on the driver display. It's the standard engine on every 2500 HD trim, and it still runs through an Allison 10-speed. What changed with the steering and brakes? Both are new, and GM says each one is a first for the heavy-duty segment. Electric rack-and-pinion steering replaces the old hydraulic setup, and a system GM calls eBoost replaces the hydraulic brake assist. System What's new for 2027 Steering Electric power steering with about 30% more power than the current HD hydraulic gear, per GM. No pump, hoses or fluid. Full assist at any engine speed. Brakes eBoost electronic brake boost, larger 14.6-inch front rotors, new four-piston fixed front calipers, upgraded rear hardware, shorter pedal travel. Drive modes Tow/Haul tunes the engine, shifts, exhaust brake, grade braking, steering and brake boost for a load. New Terrain Mode on the ZR2 gives one-pedal off-road driving in 4HI and 4LO. One practical upside: steering and braking no longer share a single hydraulic source. GM also says the brake system can flag fade or a leak sooner, and it supports Adaptive Cruise Control and Automatic Emergency Braking. On a long pull over Lookout Pass with a camper behind you, steady assist and shorter pedal travel are the changes you'll notice. How much more does the 2027 Silverado 2500 HD cost? Announced 2500 HD pricing is $1,000 to $1,500 higher than 2026, depending on trim. The WT starts at $49,995 and the High Country at $78,195, both including the $2,795 destination charge. 2500 HD trim 2027 price with destination Increase vs 2026 MSRP WT $49,995 +$1,000 Custom $53,295 +$1,000 LT $56,695 +$1,000 LTZ $67,695 +$1,300 ZR2 $77,695 +$1,400 High Country $78,195 +$1,500 Those figures were reported by Autoblog, TFLtruck and CarBuzz; Chevrolet's own site hasn't posted MSRP yet. If price is the deciding factor, keep an eye on our new Chevrolet specials. 2027 Silverado 3500 HD pricing is not yet released. Are there any trim changes? The lineup is still six trims: WT, Custom, LT, LTZ, ZR2 and High Country. The one notable shuffle is the Trail Boss package, which Chevrolet now offers on the HD Custom for the first time. On the Custom, Trail Boss brings 20-inch wheels with BFGoodrich All-Terrain tires, the Z71 suspension package with twin-tube shocks, an Autotrac 2-speed transfer case and a Z71 skid plate. The ZR2 has a 1.5-inch lift, larger Multimatic DSSV dampers, rear e-locker and 35-inch mud-terrains, and picks up the new Terrain Mode. Trail Boss package pricing is not yet released, and Chevrolet hasn't confirmed whether the LT and LTZ keep a Trail Boss option for 2027. What hasn't Chevrolet announced yet? Quite a bit, so be wary of anyone quoting firm numbers on these: 3500 HD pricing Towing and payload for each cab, bed and axle setup Cab and bed configurations Fuel economy (HD pickups aren't EPA rated) Warranty terms for the 8.3L Duramax Full standard equipment by trim We'll update this post as GM publishes each one. Until then, the diesel's 38,000-pound gooseneck and 20,000-pound conventional maximums, and the gas engine's 19,000-pound maximum, are for properly equipped trucks, not what every truck on the lot is rated for. Talk to us about a 2027 Silverado HD GM expects the 2027 Silverado HD at dealers starting late 2026. Watch our new Silverado 2500 HD inventory for arrivals, or send the Knudtsen Chevrolet team a message with the trim, engine and trailer you have in mind. If a half-ton would cover your needs, compare it with the 2027 Silverado 1500. We're in Post Falls, a short drive from Coeur d'Alene and Spokane. Frequently Asked Questions What is the biggest change on the 2027 Silverado HD? The new 8.3L Duramax turbo-diesel V8, which makes 555 horsepower and 1,230 lb-ft of torque and replaces the 6.6L Duramax. Does the 2027 Silverado HD have a new body or interior? No. Chevrolet says the exterior may look familiar, and Edmunds reports the sheetmetal and interior carry over. The changes are in the engines, steering, brakes and trailering tech. How much did 2027 Silverado 2500 HD prices go up? Announced prices are $1,000 to $1,500 higher than 2026, depending on trim. The WT starts at $49,995 including the $2,795 destination charge. Is electric power steering a good idea on a heavy-duty truck? GM says its new system has about 30 percent more power than the hydraulic steering it replaces, gives full assist at any engine speed, has built-in redundancy and needs no pump, hoses or fluid. Is the Trail Boss available on the 2027 Silverado HD? Yes. Chevrolet offers the Trail Boss package on the HD Custom for the first time. Package pricing and LT or LTZ availability have not been released.