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● TRACKER Updated 14d ago · 34 sources tracked

GM Teases New 8.3-Liter Duramax Diesel V8 For Its Heavy-Duty Trucks

General Motors has established pricing for the 2027 Chevrolet Silverado HD, raising base costs across trims by $1,000 to $1,500. Buyers selecting the heavy-duty truck lineup will also face an $11,400 price tag for the newly introduced 8.3-liter Duramax diesel V8 engine option. These pricing adjustments position the heavy-duty haulers alongside updates to other vehicle features, including a digital screen readout that replaces the traditional oil dipstick for the massive powerplant. Meanwhile, separate technology updates involve shifting OnStar toward artificial intelligence capabilities to assist vehicle owners and electric vehicle operators.

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  • ✓ Chevrolet raised 2027 Silverado 2500HD prices by $1,000 to $1,500 per trim.
  • ✓ The new 8.3-liter Duramax diesel costs $11,400.
🛡️ Source Corroboration: 34 independent reporting domains (100% confidence) ⏱ Read time: ~2 min

What changed

Corroborated reporting verified specific trim-level price increases for the 2027 Silverado HD alongside the confirmed $11,400 cost for the 8.3-liter Duramax diesel engine.

Live updates

  1. GM Prices 2027 Silverado HD and New Duramax V8 Engine

    General Motors has established pricing for the 2027 Chevrolet Silverado HD, raising base costs across trims by $1,000 to $1,500. Buyers selecting the heavy-duty truck lineup will also face an $11,400 price tag for the newly introduced 8.3-liter Duramax diesel V8 engine option. These pricing adjustments position the heavy-duty haulers alongside updates to other vehicle features, including a digital screen readout that replaces the traditional oil dipstick for the massive powerplant. Meanwhile, separate technology updates involve shifting OnStar toward artificial intelligence capabilities to assist vehicle owners and electric vehicle operators.

    Why it matters

    Automotive pricing strategies for heavy-duty trucks reflect rising costs for high-output powertrain options and base vehicle trims. General Motors continues to position its heavy-duty trucks against rival offerings from Ford and Ram while simultaneously expanding in-vehicle technology integration through OnStar.

    What is confirmed

    • Chevrolet raised 2027 Silverado 2500HD prices by $1,000 to $1,500 per trim.
    • The new 8.3-liter Duramax diesel costs $11,400.

    What to watch next

    • Dealer availability and official order book opening dates for the 2027 Silverado HD
    • Further announcements regarding OnStar AI feature rollout timelines
    Sources used for this update (2)
    1. autos.yahoo.com — GM Is Turning OnStar Into An AI Assistant For Your Car - Yahoo Autos
    2. www.motorbiscuit.com — 2027 Silverado HD Price: Up to $1,500 More, Duramax $11,400
    confidence 100%

  2. GM Introduces 8.3-Liter Duramax Diesel V8 For 2027 Heavy-Duty Trucks

    General Motors is rolling out an all-new 8.3-liter Duramax turbo-diesel V8 engine for the 2027 Chevrolet Silverado HD and GMC Sierra models. The massive powerplant produces 555 horsepower and 1,230 pound-feet of torque as an $11,400 upgrade, while base prices for Silverado HD trucks increase by up to $1,500. Additionally, GM is replacing the traditional oil dipstick with a digital screen readout on trucks equipped with this engine. Automotive reports indicate this diesel option serves as a lower-cost upgrade compared to competitor offerings from Ford and Ram.

    Why it matters

    General Motors is relying on the updated 2027 Chevrolet Silverado and GMC Sierra trucks to drive financial growth amidst pressure from tariffs, inflation, and electric vehicle costs. The inclusion of the 8.3-liter V8-diesel motor provides the heavy-duty lineup with substantial pulling power and new profit drivers. Meanwhile, buyers face structural changes such as the removal of physical oil dipsticks in favor of digital monitoring systems.

    What is confirmed

    • General Motors developed a new 8.3-liter V8-diesel engine for the Chevrolet Silverado and GMC Sierra HD.
    • The new 8.3-liter Duramax turbo-diesel V8 delivers 555 horsepower and 1,230 pound-feet of torque.
    • The massive new powerplant costs $11,400 as an upgrade, while base prices for Silverado HD trucks have risen by up to $1,500.
    • GM is updating 2027 heavy-duty pickup trucks by removing the traditional oil dipstick and replacing it with a digital screen readout.

    Still unconfirmed

    • Automotive reports indicate this diesel option serves as a lower-cost upgrade compared to similar offerings from competitors like Ford and Ram.

    What to watch next

    • Final dealership pricing and exact delivery dates for the 2027 Chevrolet Silverado HD and GMC Sierra models.
    • Official performance benchmarks and EPA ratings for the 8.3-liter Duramax diesel engine.
    • Consumer and fleet feedback regarding the digital oil screen readout versus traditional dipsticks.
    Sources used for this update (4)
    1. www.lancastermotor.com — The New Duramax Diesel in the 2027 Chevy Silverado HD
    2. www.motortrend.com — 2027 Chevy Silverado, GMC Sierra: GM’s New Profit Drivers
    3. topgear.nl — General Motors onthult enorme 8,3-liter V8-dieselmotor
    4. www.theautopian.com — New Chevrolet Silverado And GMC Sierra V8 Pickup Truck Owners ...
    confidence 95%

  3. GM Replaces Oil Dipsticks With Digital Readouts on 2027 V8 Trucks

    General Motors is updating its 2027 heavy-duty pickup trucks by removing the traditional oil dipstick and replacing it with a digital screen readout. This change applies to the newly introduced 8.3-liter Duramax turbo-diesel V8 engine, which delivers 555 horsepower and 1,230 pound-feet of torque for the Silverado HD and Sierra models. The massive new powerplant costs $11,400 as an upgrade, while base prices for Silverado HD trucks have risen by up to $1,500. Automotive reports indicate this diesel option serves as a lower-cost upgrade compared to similar offerings from competitors like Ford and Ram.

    Why it matters

    The introduction of the 8.3-liter Duramax engine marks a major competitive push in the heavy-duty truck segment for the 2027 model year. By undercutting rival upgrade costs while raising overall vehicle base prices, General Motors is restructuring how it prices high-capability powertrains. The simultaneous shift to digital maintenance indicators reflects a broader industry move toward electronic monitoring systems.

    What is confirmed

    • General Motors is replacing the physical oil dipstick with a digital screen readout on its 2027 Silverado and Sierra V8 engines.

    Still unconfirmed

    • The 8.3-liter Duramax turbo-diesel V8 engine is a cheaper upgrade over the standard gas engine than competing offerings from Ford and Ram.

    What to watch next

    • Official consumer feedback and testing of the new digital oil gauge system.
    • Further announcements from Ford and Ram regarding potential pricing or powertrain responses.
    Sources used for this update (2)
    1. stickshifting.com — GM’s 2027 V8 Trucks Are Back, But The Oil Dipstick Is ...
    2. www.youtube.com — America's New Diesel Breakthrough Changes EVERYTHING
    confidence 90%

  4. GM Details New 8.3L Duramax V8 For 2027 Heavy-Duty Trucks

    General Motors is introducing an all-new 8.3-liter Duramax turbo-diesel V8 engine for its 2027 model year heavy-duty pickup trucks. The massive powerplant generates 555 horsepower and 1,230 pound-feet of torque, making it the top performer in its segment. According to automotive reports, this new diesel option is a cheaper upgrade over the standard gas engine than competing offerings from Ford and Ram. Additionally, Chevrolet has increased prices for its Silverado HD pickup trucks by up to $1,500, with the new Duramax engine costing $11,400.

    Why it matters

    The rollout of the 8.3-liter Duramax engine runs counter to broader automotive trends favoring electrification and smaller powertrains. The new L6P configuration fully replaces the older 6.6-liter L5P motor and arrives alongside higher tow ratings, electric steering, and improved braking systems. As heavy-duty truck manufacturers compete on power and capability, GM maintains internal combustion development despite rival strategies.

    What is confirmed

    • The new 8.3-liter Duramax diesel engine generates 555 horsepower and 1,230 pound-feet of torque for 2027 heavy-duty pickup trucks.
    • GM's new diesel engine is a cheaper upgrade over the gas engine than the diesel options offered by Ford and Ram.
    • Chevrolet increased prices for its Silverado HD heavy-duty pickup trucks by up to $1,500.

    Still unconfirmed

    • A class action lawsuit alleges that GM uses low oil levels to deny warranty claims on Duramax engines, pointing to dealer bulletins regarding cracked oil coolers.

    What to watch next

    • Official automaker announcements regarding fuel economy and final payload capacities.
    • Market reception and actual towing performance tests compared to Ford and Ram heavy-duty trucks.
    Sources used for this update (6)
    1. www.thedrive.com — GM's Mega 8.3L Duramax Diesel Is Actually Cheaper Than the ...
    2. carcody.com — GM Mongoose Duramax vs. Ford High-Output Power ... - Carcody
    3. www.fleetequipmentmag.com — Gas Vs. Diesel: GM’s New Heavy-Duty Engines
    4. www.worktruckonline.com — Truckers’ Strike Rumors, Electric Fleet Lessons, and GM’s New ...
    5. autos.yahoo.com — A Lawsuit Says GM Blames Owners’ Low Oil for Dead Duramaxes ...
    6. daxstreet.com — Chevy Raises Silverado HD Prices Up to $1,500 and the New ...
    confidence 90%

  5. GM Defies Industry Trends With New 8.3-Liter Duramax V8 Engine

    General Motors is challenging the shift toward electrification and smaller powertrains by developing an all-new 8.3-liter Duramax turbo-diesel V8 engine for its heavy-duty pickup trucks. Slated for the 2027 model year, this massive powerplant generates 555 horsepower and 1,230 pound-feet of torque. The engine rollout includes higher tow ratings, electric steering, improved braking systems, and a new L6P configuration that fully replaces the older 6.6-liter L5P motor. This bold move directly opposes competitors like Ford and runs counter to broader automotive movements away from diesel technology.

    Why it matters

    Stricter emissions rules and cheaper alternatives like hybrids and electric vehicles have led many in the industry to declare private vehicle diesel engines near death. Rather than engaging in a direct power-per-liter contest with rivals such as Ford, General Motors designed its new engine to be understressed on purpose. The heavy-duty lineup updates target commercial and heavy-haul truck buyers who still demand massive displacement and traditional torque capabilities.

    What is confirmed

    • General Motors is introducing an all-new 8.3-liter Duramax turbo-diesel V8 engine for the 2027 model year.
    • The massive powerplant delivers 555 horsepower and 1,230 pound-feet of torque.
    • The new L6P engine configuration completely replaces the previous 6.6-liter L5P motor.
    • General Motors Company is headquartered in Detroit, Michigan, United States.
    • By total sales, General Motors has continuously been the largest automaker in the United States.

    Still unconfirmed

    • Stricter emissions rules and cheaper hybrids and electric vehicles mean diesel will soon be dead for private vehicles and heavy industry.

    What to watch next

    • Official performance validation and EPA emissions certifications for the 8.3-liter Duramax engine.
    • Full pricing and availability details for the 2027 Chevrolet Silverado HD and GMC Sierra HD lineups.
    Sources used for this update (5)
    1. www.gmfinancial.com — MyAccount Login - GM Financial
    2. en.wikipedia.org — General Motors - Wikipedia
    3. www.gmfinancial.com — Contact GM Financial | GM Financial Customer Service | GM...
    4. carbuzz.com — Toyota Says It's Outdated Tech, But GM’s Massive New V8 Is A Huge Middle Finger To The Death Of Diesel
    5. carbuzz.com — 'Understressed On Purpose' - GM's 555-HP Mongoose Duramax Makes Less Power Per Liter Than Ford's Diesel
    confidence 85%

  6. GM Unveils 8.3L Duramax V8 For 2027 Heavy-Duty Trucks

    General Motors is introducing an all-new 8.3-liter Duramax turbo-diesel V8 engine for the 2027 model year, targeting heavy-duty pickup trucks including the Chevrolet Silverado HD and GMC Sierra HD. The massive powerplant delivers 555 horsepower and 1,230 pound-feet of torque. This large displacement engine challenges competitors like Ford while running counter to broader industry trends toward electrification. Alongside the engine rollout, the automaker is upgrading its heavy-duty pickup lineup with electric steering, improved braking systems, higher tow ratings, and a new L6P engine configuration that completely replaces the previous 6.6-liter L5P motor.

    Why it matters

    General Motors is betting big on engine displacement with the codename Mongoose powerplant, which breaks a 56-year-old record previously held by the automaker. The heavy-duty lineup updates aim to counter competitors like Ford and Ram in the heavy-duty truck segment. However, questions remain regarding how ownership costs, durability, and towing capabilities stack up against the massive power ratings.

    What is confirmed

    • General Motors is introducing a new 8.3-liter Duramax turbo-diesel V8 engine for the 2027 model year in the Chevrolet Silverado HD and GMC Sierra HD.
    • The new engine generates 555 horsepower and 1,230 pound-feet of torque.
    • The engine breaks a 56-year-old record held by GM.

    Still unconfirmed

    • Ford and Ram may struggle to match the new diesel power output, though towing dominance remains contested.

    What to watch next

    • Detailed performance testing of the 8.3-liter Duramax in towing conditions
    • Official pricing and availability details for the 2027 Chevrolet Silverado HD and GMC Sierra HD
    • Further mechanical disclosures regarding the chassis engineering and DEF tank size
    Sources used for this update (5)
    1. autopostglobal.com — GM Just Unleashed an 8.3-Liter Diesel—Ford Better Watch Out
    2. tfltruck.com — Video: 2027 GMC Sierra HD 8.3L Duramax V8 & Chassis ...
    3. carbuzz.com — GM's Biggest Engine Is The 8.3 Mongoose, And It ... - CarBuzz
    4. backfirenews.com — GM’s 555-HP Duramax 8.3L V8: Power King, But Not Tow King
    5. autos.yahoo.com — GM Brings Bigger Diesel Power With New 8.3L Duramax V8 for ...
    confidence 95%

  7. GM's 8.3L Duramax V8 Engine Has Room To Grow

    General Motors is betting big on engine displacement by introducing the new 8.3-liter Duramax diesel V8 engine, codenamed Mongoose. Built for the 2027 Chevrolet Silverado HD and GMC Sierra HD models, the massive powerplant generates best-in-class horsepower and torque ratings, delivering 555 horsepower and 1,230 pound-feet of torque. Alongside the engine rollout, the automaker is upgrading its heavy-duty pickup lineup with electric steering, improved braking systems, higher tow ratings, and a new L6P engine configuration that completely replaces the previous 6.6-liter L5P motor in the truck lineup.

    Why it matters

    The introduction of the Mongoose engine represents a major shift in heavy-duty truck engineering as manufacturers compete for supremacy in towing capacity and raw output. General Motors intends for this new displacement architecture to challenge rival offerings directly in the heavy-duty segment. While specifications for the initial release are substantial, indications point to additional performance potential waiting to be unlocked.

    What is confirmed

    • General Motors has revealed an 8.3-liter Duramax diesel V8 engine codenamed Mongoose for the 2027 Chevrolet Silverado HD and GMC Sierra HD models.
    • The heavy-duty powerplant generates 555 horsepower and 1,230 pound-feet of torque.

    Still unconfirmed

    • The new 8.3-liter Duramax engine has additional juice left to squeeze beyond its initial output.

    What to watch next

    • Official confirmation of final towing and payload capacity ratings for the 2027 truck lineup.
    • Details on how the new electric steering and braking systems integrate with the heavier engine architecture.
    Sources used for this update (4)
    1. gmauthority.com — GM 8.3L V8 Duramax Mongoose Engine Has Room To Grow
    2. gmauthority.com — 8.3L Duramax Mongoose L6P To Completely Replace 6.6L L5P
    3. www.corvetteblogger.com — [VIDEO] GM Continues to Bet Big on Displacement with 8.3L ...
    4. theautowire.com — GM's 8.3L Duramax Mongoose: 555 HP, Electric Steering, and a ...
    confidence 95%

  8. GM Unveils 8.3L Duramax V8 For 2027 Heavy-Duty Trucks

    General Motors has officially revealed a massive 8.3-liter Duramax diesel V8 engine, codenamed "Mongoose," built for the 2027 Chevrolet Silverado HD and GMC Sierra HD models. The heavy-duty powerplant generates 555 horsepower and 1,230 pound-feet of torque, taking direct aim at rival offerings in the heavy-duty truck segment. Alongside the new diesel architecture, GM is upgrading the pickup lineup with higher tow ratings, improved braking systems, and a more sophisticated steering setup.

    Why it matters

    The introduction of the larger diesel architecture signals a major push by General Motors to dominate the heavy-duty truck segment. By targeting heavy-duty competitors like Ford and its 6.7-liter Power Stroke, GM is aggressively updating its mechanical hardware to attract commercial and heavy-tow buyers. The mechanical overhaul spans engine output, steering configurations, and overall towing capacity.

    What is confirmed

    • General Motors has officially revealed the new 8.3-liter Duramax V8 engine for the 2027 Chevrolet Silverado HD and GMC Sierra HD.
    • The new 8.3-liter Duramax diesel engine produces 555 horsepower and 1,230 pound-feet of torque.
    • The 2027 Chevrolet Silverado HD and GMC Sierra HD feature higher tow ratings and a more sophisticated steering setup.

    What to watch next

    • Specific maximum towing capacity and payload numbers for individual trim levels.
    • Pricing and exact dealership arrival dates for the 2027 Silverado HD and Sierra HD.
    Sources used for this update (4)
    1. www.caranddriver.com — Chevy and GMC’s New Heavy-Duty Trucks Get a Huge 8.3-Liter ...
    2. www.duramaxnews.com — GM Officially Reveals the 8.3L Duramax: 555 HP, 1,230 LB-FT ...
    3. gmauthority.com — GM 8.3L V8 Duramax Diesel Output Revealed - GM Authority
    4. daxstreet.com — GM Unveils New 8.3-Liter Duramax Diesel for 2027 Heavy-Duty ...
    confidence 100%

  9. GM Teases 8.3L Duramax Diesel for 2027 HD Trucks

    General Motors has unveiled its new 8.3-liter Duramax diesel V8 engine, the "Mongoose," for the 2027 Chevrolet Silverado HD and GMC Sierra HD. The engine produces 555 horsepower and 1,230 pound-feet of torque, targeting Ford's 6.7-liter Power Stroke in the heavy-duty segment. GM is also upgrading braking, steering, and towing capabilities for its 2027 HD truck lineup.

    Why it matters

    The new engine is part of GM's effort to lead the heavy-duty truck market in power and torque. The 2027 HD truck lineup is expected to compete directly with Ford's offerings. Diesel engine development is significant as diesel prices soar.

    What is confirmed

    • The 8.3-liter Duramax diesel V8 engine produces 555 horsepower.
    • The 8.3-liter Duramax diesel V8 engine produces 1,230 pound-feet of torque.
    • GM's new engine targets Ford's 6.7-liter Power Stroke in the heavy-duty segment.

    Still unconfirmed

    • If tuned for power over efficiency, the new engine's fuel use will be high.

    What to watch next

    • 2027 Chevrolet Silverado HD and GMC Sierra HD release dates
    • Comparative performance and fuel efficiency tests against Ford's Power Stroke
    • Pricing and production details for the 2027 HD truck lineup
    Sources used for this update (2)
    1. carbuzz.com — GM's New 8.3L Diesel Out-Torques Ford Powerstroke By The Tiniest Margins
    2. autos.yahoo.com — GM teases 8.3-liter 'Mongoose,' its biggest engine ever, as diesel prices soar - Yahoo Autos
    confidence 100%

  10. GM reveals 8.3-liter Duramax V8 for 2027 Heavy-Duty trucks

    General Motors unveiled the Mongoose, an 8.3-liter Duramax diesel V8 engine for the 2027 Chevrolet Silverado HD and GMC Sierra HD. The powerplant produces 555 horsepower and 1,230 pound-feet of torque. This engine targets Ford's 6.7-liter Power Stroke as GM seeks the power and torque crown in the heavy-duty segment. Alongside the engine, GM is upgrading the braking, steering, and towing capabilities of its 2027 HD truck lineup.

    Why it matters

    GM moved engine design fully in-house to expand DMAX capacity and protect its diesel market share. The Mongoose engine is the company's direct response to competition from Ford in the high-output diesel pickup market.

    What is confirmed

    • The Mongoose 8.3-liter V8 diesel produces 555 horsepower and 1,230 pound-feet of torque.
    • The engine will be available in 2027 model year Chevrolet Silverado HD and GMC Sierra HD trucks.

    Still unconfirmed

    • GM upgraded towing, steering, and braking for its 2027 HD trucks.

    What to watch next

    • Official pricing for 2027 HD models
    • Comparative towing capacity ratings against Ford
    Sources used for this update (3)
    1. autos.yahoo.com — GM reveals 2027 Silverado HD and Sierra HD with 8.3-liter diesel
    2. autos.yahoo.com — GM’s Monster 8.3L Duramax Just Took The Power And Torque Crown From Ford
    3. theshopmag.com — GM Introduces All-New Duramax 8.3L Turbo-Diesel V-8 for Heavy-Duty Trucks
    confidence 100%

  11. GM Teases 8.3-Liter Duramax Diesel V8 Known As Mongoose

    General Motors has teased an all-new heavy-duty diesel engine called Mongoose for its upcoming heavy-duty trucks. Designated as an 8.3-liter Duramax diesel V8, the powerplant is slated for 2027 model year HD trucks including the Chevrolet Silverado HD and GMC Sierra HD. According to General Motors and subsequent reports, the engine targets competitor Ford and aims to deliver best-in-segment muscle with confirmed outputs of 555 horsepower and 1,230 pound-feet of torque. This heavy-duty addition brings engine design fully in-house for General Motors while expanding DMAX capacity to defend the company's diesel share in heavy-duty pickups.

    Why it matters

    General Motors is aggressively updating its truck portfolio, having released pricing and features for the 2027 Chevrolet Silverado 1500 alongside details for next-generation pickup engines. The heavy-duty market relies heavily on power metrics to attract commercial and towing customers, making the introduction of the Mongoose a strategic challenge against established competitors. Bringing engine design in-house signals a major shift in how General Motors manages its heavy-duty powertrain development and manufacturing pipeline.

    What is confirmed

    • General Motors teased an all-new HD diesel engine known as Mongoose.
    • The Mongoose engine is an 8.3-liter Duramax diesel V8.
    • The engine is fitted to 2027 model year HD trucks including the Chevrolet Silverado HD and GMC Sierra HD.
    • The Mongoose delivers 555 horsepower and 1,230 pound-feet of torque.

    What to watch next

    • Further official announcements regarding full vehicle availability and towing specifications for the 2027 heavy-duty truck lineup.
    • Production milestones and capacity updates from DMAX regarding the in-house engine build.
    Sources used for this update (12)
    1. Road & Track — Deep Dive: GM’s New 6.6-Liter Small Block V-8 Has the Power, Promises the Reliability
    2. MotorTrend — 2027 Chevrolet Silverado 1500 Pricing and Features Revealed: More Is More
    3. Motor1.com — GM Teases New 8.3-Liter Duramax Diesel V8 For Its Heavy-Duty Trucks
    4. Car and Driver — GM Targets Ford While Teasing Its New Duramax Diesel 8.3-Liter V-8 Engine Called ‘Mongoose’
    5. Detroit Free Press — Why no dipstick is needed to check oil in GM's next-gen pickup engines
    6. Road & Track — GM’s New HD Pickup Truck Engine Is an 8.3-Liter Behemoth Known As ‘Mongoose’
    7. General Motors — Meet the Mongoose: GM teases all-new HD diesel engine
    8. Car and Driver — 2027 GMC Sierra 1500 Starting Prices Spike with New Generation
    9. autos.yahoo.com — GM Unleashes 8.3L Duramax V8 with 555 HP and 1,230 LB-FT for 2027
    10. www.autoevolution.com — GM Unleashes Mongoose Duramax 8.3L Turbo Diesel V8, Promises Best-In-Segment Muscle
    11. www.slashgear.com — 555 HP: GM's New V8 Duramax Is A Beast, But Its Torque Is The Real Story
    12. www.automotiveworld.com — GM unveils all-new Duramax 8.3-litre diesel for HD pickups
    confidence 100%
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