Custom Order Your Mongoose Today: Build Your 2027 Chevrolet Silverado HD Frontier Chevrolet | El Reno, Oklahoma | Updated November 2026 The new Mongoose is coming—and if you already know you want one, there's no reason to simply hope the right truck eventually shows up on a dealer lot. The 2027 Chevrolet Silverado HD introduces an all-new available 8.3L Duramax Turbo-Diesel V8, known as the Mongoose engine, producing 555 horsepower and 1,230 lb-ft of torque. With maximum available towing reaching 38,000 pounds when properly equipped, this isn't just another Silverado HD engine update. It's one of Chevrolet's biggest heavy-duty powertrain changes in years. At Frontier Chevrolet in El Reno, Oklahoma, we're helping customers explore ordering the 2027 Silverado 2500HD and 3500HD in the configurations they actually want. If you're serious about owning a Mongoose-powered Silverado HD, now is the time to start the conversation. Quick Answer: Can I Custom Order a 2027 Silverado HD With the Mongoose Engine? Yes. Frontier Chevrolet can help customers explore ordering a 2027 Chevrolet Silverado 2500HD or 3500HD equipped with the available 8.3L Duramax Mongoose engine. Availability of specific configurations depends on Chevrolet production, allocation, ordering constraints and other factors, but starting early gives you the opportunity to identify exactly what you want rather than simply choosing from whatever eventually reaches dealer inventory. Meet the Mongoose: Chevrolet's New 8.3L Duramax The biggest news surrounding the 2027 Silverado HD is under the hood. Chevrolet's new available 8.3L Duramax Turbo-Diesel V8 delivers: 555 horsepower 1,230 lb-ft of torque Allison 10-speed automatic transmission Diesel exhaust braking Grade-braking technology Up to 38,000 pounds of maximum available towing when properly configured The previous 6.6L Duramax produced 470 horsepower and 975 lb-ft of torque. That means the Mongoose brings an additional 85 horsepower and 255 lb-ft of torque. For someone pulling a large fifth-wheel, livestock trailer, heavy equipment or a loaded gooseneck, those are meaningful numbers. Why Custom Order Your 2027 Silverado HD? Heavy-duty truck buyers don't all need the same truck. That's exactly why ordering can make sense. A Silverado HD used to pull cattle across Western Oklahoma has different requirements than one pulling a fifth-wheel RV across the country. A contractor hauling equipment may need something completely different from either one. When you're investing in a heavy-duty truck, settling for the wrong configuration because it's the truck sitting on the lot doesn't make much sense. Depending on Chevrolet availability and ordering constraints, an order can allow you to target the combination that best fits your needs, including: Silverado 2500HD or 3500HD Single rear wheel or dual rear wheel 2WD or 4WD Cab configuration Bed configuration Trim level Exterior color Interior preferences Trailering equipment Convenience and technology packages Available 8.3L Duramax Mongoose engine The goal is simple: Build the truck around the job instead of trying to make the job fit the truck. Silverado 2500HD or 3500HD: Which Mongoose Should You Order? Before worrying about color, wheels or interior options, this is the more important decision. Order a Silverado 2500HD If... A properly configured 2500HD comfortably handles your loaded trailer, tongue or pin weight, passengers and cargo. For many buyers, a 2500HD offers an excellent combination of heavy-duty capability and everyday usability. It can be a strong fit for: Ranch and farm use Livestock trailers Equipment trailers Construction Large travel trailers Recreational towing Work during the week and personal use on the weekend Order a Silverado 3500HD If... Your workload requires greater payload capacity or more demanding towing configurations. A 3500HD—particularly an available dual-rear-wheel configuration—deserves consideration for: Large fifth-wheel campers Heavy gooseneck trailers Commercial hauling Heavy equipment Agricultural operations High pin-weight trailers Demanding fleet applications Don't order a 3500HD simply because it's bigger. And don't order a 2500HD simply because it's easier to live with. Start with the weight you're actually moving. Frontier Chevrolet can help you work backward from your towing and payload requirements to identify the Silverado HD configuration that makes sense. Which 2027 Silverado HD Trim Should You Order? Chevrolet offers six Silverado HD trim levels for 2027. Work Truck The practical choice for customers who need the truck primarily as a tool. WT can make sense for farms, fleets, construction companies and commercial buyers who put capability ahead of luxury. Custom Custom adds more styling and convenience while remaining value-focused. For 2027, the Trail Boss package becomes available on Custom for the first time, creating an interesting option for buyers who need HD capability but regularly encounter dirt roads, pastures or rough jobsites. LT For many buyers, LT may be the sweet spot. It provides a strong balance of technology, comfort and heavy-duty capability without moving all the way into the premium trims. LTZ LTZ moves the Silverado HD further toward premium comfort and technology while maintaining its serious work capability. ZR2 The Silverado HD ZR2 is designed for buyers who need heavy-duty capability away from pavement. Available off-road hardware includes specialized Multimatic DSSV dampers, a factory lift, 35-inch mud-terrain tires, Terrain Mode and additional off-road equipment. High Country High Country sits at the premium end of the Silverado HD lineup. If you spend significant time in your truck and want serious diesel capability combined with a more upscale interior and advanced technology, High Country deserves consideration. What If You Need a Very Specific Silverado HD? This is where ordering becomes especially valuable. Maybe you're looking for: A 3500HD dually with the Mongoose for a large fifth-wheel. Maybe it's: A 2500HD Crew Cab 4x4 LT for cattle and equipment trailers. Or perhaps: A High Country Duramax that can work during the week without feeling like a work truck when you're traveling with the family. The more specific your requirements become, the less likely it is that the exact truck happens to be sitting in inventory at exactly the right time. That's why we'd rather start by asking: What do you need the truck to do? From there, we can help determine which configuration deserves consideration. How Does Custom Ordering a Chevrolet Silverado HD Work? The process starts with a conversation. 1. Tell Us How You'll Use the Truck Trailer type, loaded trailer weight, expected pin or tongue weight, payload requirements and how frequently you tow all matter. This should come before picking options. 2. Choose Your Silverado HD Configuration We'll help you explore the available: 2500HD and 3500HD models Cab and bed combinations 2WD and 4WD configurations Single and dual-rear-wheel configurations Trim levels Engine availability Trailering equipment Packages and options 3. Build the Truck You Want Once you've identified the correct foundation, we can work through the available colors, interior choices, technology and convenience equipment. 4. Frontier Chevrolet Reviews the Order We'll review the requested configuration and available ordering information. Some combinations may be affected by Chevrolet production constraints, allocation or option availability. If something isn't currently available, we'll explain the options rather than promise something Chevrolet can't build. 5. Submit the Order When Available Once the configuration and ordering requirements are confirmed, Frontier Chevrolet can work with you on the next steps for submitting the order. 6. Follow the Order's Progress Production and transportation timing can vary. We'll communicate available order information as the truck moves through the process. 7. Take Delivery of Your Mongoose When your Silverado HD arrives, we'll complete the delivery process and help you get familiar with the truck, its technology and its trailering features. Then it's time to put it to work. How Long Does a Custom-Ordered Silverado HD Take? There isn't one honest answer. Production schedules, allocation, option constraints, transportation and demand can all affect timing. A highly specific 3500HD configuration may have a different timeline than a more common 2500HD. That's why we're not going to advertise an arbitrary number of weeks and pretend every order follows the same schedule. If timing matters, talk to us before ordering. We can discuss the information available at that time and help you decide whether ordering or searching available/incoming inventory makes more sense. Do I Have to Pay MSRP When I Custom Order? Pricing should be discussed based on the specific order and programs available at the time. Manufacturer incentives, programs and eligibility can change between the date an order is placed and the date a vehicle arrives. Rather than make a blanket pricing promise months before delivery, Frontier Chevrolet will explain the applicable pricing and available programs associated with your specific purchase. Can I Trade My Current Truck When My Mongoose Arrives? Yes, Frontier Chevrolet can evaluate your current vehicle as part of the purchase process. Keep in mind that a vehicle's market value can change over time. If you're ordering a truck that won't arrive immediately, today's trade value shouldn't automatically be treated as the vehicle's value months from now. We'll evaluate the trade based on its condition, mileage and market when appropriate. Can I Finance a Custom-Ordered Silverado HD? Yes. Frontier Chevrolet can help customers explore available financing options when purchasing their Silverado HD. Actual rates, terms, lender approvals and manufacturer programs will depend on the customer and programs available at the appropriate time. Should You Order a 2027 Mongoose or Buy a 2026 Duramax Now? This comes down to your priorities. Wait for the 2027 Mongoose if: You specifically want the new 8.3L Duramax You want 555 horsepower and 1,230 lb-ft of torque You need additional maximum towing capability You want the new 2027 HD technology You can wait for the right truck Consider a 2026 Silverado HD if: You need a heavy-duty truck now The current 6.6L Duramax already handles your workload We have the right configuration available Current pricing or incentives make the 2026 attractive You don't need the Mongoose's additional capability Newer doesn't automatically mean better for your situation. If you need a truck today, waiting months for capability you don't actually need may not make financial sense. If you specifically want the Mongoose, however, settling for something else because it's available today probably won't make you happy either. Frequently Asked Questions About Ordering a 2027 Silverado HD Mongoose What is the Mongoose engine? The Mongoose is Chevrolet's new 8.3L Duramax Turbo-Diesel V8 available in the 2027 Silverado HD. It produces 555 horsepower and 1,230 lb-ft of torque. Can I order the Mongoose in a Silverado 2500HD? The new 8.3L Duramax is available in the 2027 Silverado HD lineup. Specific configurations and availability should be confirmed when placing an order. Can I order a 2027 Silverado 3500HD dually with the Mongoose? Chevrolet offers the Silverado 3500HD in dual-rear-wheel configurations. Frontier Chevrolet can help you explore available 3500HD Duramax configurations and current ordering availability. How much can the Mongoose Silverado HD tow? The 2027 Silverado HD offers up to 38,000 pounds of maximum available towing when properly equipped. That maximum requires a specific configuration and does not apply to every Silverado HD. Can I choose my Silverado HD color and options? Customers can select from combinations Chevrolet makes available for the applicable model and trim. Some equipment or combinations may be restricted by production constraints or ordering requirements. When will the 2027 Silverado HD arrive? Chevrolet has announced late 2026 availability. Individual dealership arrival and custom-order timing will depend on production, allocation, transportation and the specific configuration. Can Frontier Chevrolet help me determine which Silverado HD I need? Yes. Bring us your trailer information and tell us how you use your truck. We can help you compare 2500HD and 3500HD configurations, gas and Duramax powertrains, payload considerations and available trailering equipment. Don't Settle. Custom Order Your Mongoose Today. If you've been waiting for Chevrolet's next-generation heavy-duty diesel, this is it. 8.3 liters. 555 horsepower. 1,230 lb-ft of torque. Up to 38,000 pounds of maximum available towing when properly equipped. But the numbers only matter if they're attached to the right truck. Whether your ideal Silverado HD is a 2500HD LT 4x4, a 3500HD dually built for a fifth-wheel, a ZR2 for demanding Oklahoma terrain or a High Country that combines serious capability with premium comfort, Frontier Chevrolet can help you explore building the truck around your needs. Don't wait for your perfect Mongoose to randomly appear. Custom Order Your 2027 Silverado HD at Frontier Chevrolet Frontier Chevrolet 1640 E. Highway 66 El Reno, OK 73036 Serving Chevrolet truck buyers throughout El Reno, Yukon, Mustang, Oklahoma City, Weatherford, Clinton and Western Oklahoma. Built on Trust. Driven by Service. Vehicle information reflects Chevrolet's published 2027 Silverado HD information available as of November 6, 2026. Vehicle specifications, equipment, ordering availability, production constraints, pricing, incentives and delivery timing are subject to change. Maximum towing ratings require specific configurations and equipment. Always verify the individual vehicle's ratings before towing.