2027 GMC Sierra 1500 The New 2027 Sierra 1500 V8s, Explained Two brand-new V8s, a stronger TurboMax, and a class-exclusive Duramax diesel. Here's what each 2027 Sierra 1500 engine makes, what it tows, and which one we'd put in your driveway. Reserve a 2027 Sierra Compare the Engines The Short Answer Four Engines, Two of Them All-New The next-generation 2027 GMC Sierra 1500 offers four engines: the standard 2.7L TurboMax, two brand-new small-block V8s — a 5.7L and a 6.6L — and the class-exclusive 3.0L Duramax turbo-diesel. Every one pairs with a 10-speed automatic. At Weirs GMC in Arundel, the short version we give truck shoppers is this: the TurboMax is the value all-rounder, the new 5.7L V8 is the towing champ, the new 6.6L V8 is the muscle, and the Duramax is for high miles and long hauls. We've got 8 of the new Sierras on order — you can reserve one now or see the whole lineup on our Find My GMC Truck hub. At a Glance 2027 Sierra 1500 Engines Side by Side Engine Horsepower Torque Max Towing* 2.7L TurboMax 350 hp 455 lb-ft Up to ~9,400 lbs 5.7L V8 (new) 402 hp 428 lb-ft Up to 13,500 lbs 6.6L V8 (new) 481 hp 501 lb-ft Strong (max power) 3.0L Duramax diesel 305 hp 495 lb-ft Up to 12,100 lbs *Max towing when properly equipped, per GMC; varies by cab, drivetrain, and package — contact us for the exact rating on the truck you want. The Value All-Rounder 2.7L TurboMax — the Smart Standard The standard turbocharged 2.7L four-cylinder makes 350 hp and a stout 455 lb-ft of torque — GMC calls it best-in-class standard torque. It's the engine most Southern Maine drivers actually need: quick off the line, strong for everyday towing, and easier on fuel than the V8s. For a lot of commuters and light-duty haulers, it's all the truck you need. The Towing Champ All-New 5.7L V8 — Best for Towing One of two brand-new small-block V8s, the 5.7L makes 402 hp and 428 lb-ft — and it carries the highest available tow rating in the lineup, up to 13,500 lbs. If your Sierra pulls a boat to Sebago, a camper up to Baxter, or a loaded trailer for work, this is the engine we point you to. It's the classic V8 tow truck, reborn. The Muscle All-New 6.6L V8 — Maximum Power The headline engine of the whole redesign: an all-new 6.6L small-block V8 making a class-leading 481 hp and 501 lb-ft of torque. It's the most powerful gas engine ever offered in a Sierra 1500, built for drivers who want serious muscle and effortless passing power with a full load. If you want the flagship, this is it. The Long-Hauler 3.0L Duramax Turbo-Diesel — Torque + Range The class-exclusive 3.0L Duramax inline-six turbo-diesel returns with 305 hp and 495 lb-ft of torque, towing up to 12,100 lbs and delivering the kind of fuel economy and range that makes long Maine hauls easy. For high-mileage drivers and anyone who tows regularly over distance, the Duramax is the efficiency play. Our Quick Take Which 2027 Sierra Engine Is Right for You? Daily driving & light towing →  2.7L TurboMax Maximum towing (boat, camper, trailer) →  new 5.7L V8 Most power / want the flagship →  new 6.6L V8 High miles, long hauls, best range →  3.0L Duramax diesel Still deciding? We'll help you spec it — and hold your build. Reserve your 2027 Sierra 1500 before the first trucks land. Reserve Yours Now FAQ 2027 Sierra 1500 Engine Questions What engines does the 2027 GMC Sierra 1500 offer? Four: the standard 2.7L TurboMax (350 hp / 455 lb-ft), two all-new V8s — a 5.7L (402 hp) and a 6.6L (481 hp / 501 lb-ft) — and a 3.0L Duramax turbo-diesel (305 hp / 495 lb-ft). All pair with a 10-speed automatic. See them in person by reserving a 2027 Sierra. Which 2027 Sierra engine tows the most? The all-new 5.7L V8 carries the highest available tow rating, up to 13,500 lbs when properly equipped. The Duramax diesel tows up to 12,100 lbs. How much horsepower does the new 6.6L V8 make? The new 6.6L small-block V8 makes 481 hp and 501 lb-ft of torque — the most powerful gas engine ever offered in a Sierra 1500. Is the TurboMax engine good enough for towing? For light-to-moderate towing, yes. The 2.7L TurboMax makes 455 lb-ft of torque (best-in-class standard torque) and tows up to about 9,400 lbs. For a boat or camper regularly, step up to the 5.7L V8. Does the 2027 Sierra 1500 still offer a diesel? Yes. The class-exclusive 3.0L Duramax turbo-diesel returns with 305 hp, 495 lb-ft, up to 12,100 lbs of towing, and strong fuel economy for long hauls. When can I get a 2027 Sierra 1500 at Weirs GMC? GMC expects the first trucks at dealers before the end of 2026. Weirs GMC in Arundel has 8 on order and is taking reservations now — call 207-600-1088 or reserve online. Visit Weirs GMC Reserve Your 2027 Sierra 1500 in Arundel Only 8 on order — minutes from Biddeford, Kennebunk, and Portland. Reserve a 2027 Sierra Schedule a Test Drive Sierra 1500 Overview Get Pre-Approved Financing Value Your Trade-In Call 207-600-1088

2027 GMC Sierra 1500 The 2027 Sierra 1500 Trims, Explained Six trims, from the work-ready Pro to the top-luxury Denali Ultimate. Here's what each one adds, what it costs, and which Sierra we'd point you to for how you drive in Southern Maine. Reserve a 2027 Sierra Compare the Trims The Short Answer Six Trims, Pro to Denali Ultimate The next-generation 2027 GMC Sierra 1500 comes in six trims: Pro, Elevation, AT4, Denali, AT4X, and Denali Ultimate — GMC trimmed the lineup to a cleaner, more focused set for the redesign. At Weirs GMC in Arundel, the quick way we sort it: Pro is the work-ready value, Elevation adds street style, AT4 is the factory off-roader, Denali is signature luxury, AT4X is the extreme off-road build, and Denali Ultimate is the loaded flagship. We've got 8 of the new Sierras on order — you can reserve one now or see the whole lineup on our Find My GMC Truck hub. At a Glance 2027 Sierra 1500 Trims Side by Side Trim Best For Super Cruise Starting MSRP* Pro Work-truck value — $51,295 Elevation Everyday style Available $59,995 AT4 Factory off-road Standard $74,495 Denali Signature luxury Standard $76,795 AT4X Extreme off-road Standard $85,495 Denali Ultimate Loaded flagship Standard $87,895 *Starting MSRP for Crew Cab 4WD, including the $2,795 destination charge, per GMC as of September 2026; before options, taxes, and incentives, and subject to change — contact us for current pricing on the trim you want. The Value Worker Pro — the Work-Ready Sierra The Pro is the core Sierra platform: the standard 2.7L TurboMax engine, a 10-speed automatic, rear- or four-wheel drive, and the class-leading 16 cargo-bed tie-downs — built for buyers who need a capable workhorse without the luxury content. For Maine contractors, fleets, and anyone building a plow or work setup, it's the smart-money starting point. Style Without the Premium Elevation — Street Presence, Working Price Elevation layers style-focused exterior upgrades over the Pro for a truck with real street presence that still works hard. It's the sweet spot for drivers who want a sharp-looking Sierra at a sensible price, and it's the one trim below AT4 where you can add Super Cruise hands-free driving. Factory Off-Road AT4 — Trail-Ready From the Factory The AT4 is GMC's off-road-focused trim: off-road suspension tuning, skid plates, and four-wheel-drive hardware built for drivers who leave the pavement regularly — camp roads, trailheads, the back forty during deer season. Super Cruise hands-free driving is standard, so it's just as easy on the I-95 run as it is on a two-track. Signature Luxury Denali — the Luxury Daily Denali is the Sierra's premium tier: the signature Denali chrome grille, elevated materials, and the widest interior choice in the lineup — three colorways, including Terra Summit and Twilight Harbor. Super Cruise is standard. If you want a truck that tows and hauls but lives day to day like a luxury vehicle, this is the one most of our Denali buyers land on. Extreme Off-Road AT4X — Maximum Capability The AT4X sits at the top of the off-road ladder — and above the Denali on price. It comes standard with a 2-inch factory suspension lift, Multimatic DSSV plus Jounce Control dampers, front and rear electronic locking differentials, 35-inch Goodyear Wrangler Territory MT tires, a new Baja drive mode, and real carbon-fiber interior trim. For serious backcountry and deep-snow capability, nothing else in the lineup matches it. The Flagship Denali Ultimate — Loaded, Top to Bottom The Denali Ultimate is the most luxurious Sierra 1500, and it's the only trim that comes standard with the new 6.6L V8 — a class-leading 481 hp, the most powerful naturally aspirated V8 in the segment. Super Cruise with trailering capability is standard (with a 3-year subscription included), and it can be optioned with the available 11.5-inch passenger display. If you want every box checked, this is the flagship. Our Quick Take Which 2027 Sierra Trim Is Right for You? Work & value →  Pro Style on a budget →  Elevation Off-road & Maine back roads →  AT4 Everyday luxury →  Denali Extreme off-road / deep snow →  AT4X The loaded flagship →  Denali Ultimate Not sure which trim fits? We'll walk you through it — and hold your build. Reserve your 2027 Sierra 1500 before the first trucks land. Reserve Yours Now FAQ 2027 Sierra 1500 Trim Questions How many trims does the 2027 GMC Sierra 1500 have? Six: Pro, Elevation, AT4, Denali, AT4X, and Denali Ultimate. GMC streamlined the lineup for the next-generation redesign. You can see them by reserving a 2027 Sierra at Weirs GMC. What's the difference between the AT4 and AT4X? The AT4 is the factory off-road trim (off-road suspension tuning, skid plates, 4WD). The AT4X is the extreme build above it: a 2-inch lift, Multimatic DSSV plus Jounce Control dampers, front and rear e-locking differentials, 35-inch Goodyear Wrangler Territory MT tires, Baja drive mode, and carbon-fiber interior trim. Which 2027 Sierra trims have Super Cruise standard? Super Cruise hands-free driving is standard on the AT4, AT4X, Denali, and Denali Ultimate, and available on the Elevation. The 2027 system adds hands-free trailering capability. What is the top 2027 Sierra 1500 trim? The Denali Ultimate. It's the most luxurious Sierra, comes standard with the 6.6L V8 (481 hp), and includes Super Cruise with a 3-year subscription. How much does each 2027 Sierra 1500 trim cost? Starting MSRP (Crew Cab 4WD, including destination) runs $51,295 Pro, $59,995 Elevation, $74,495 AT4, $76,795 Denali, $85,495 AT4X, and $87,895 Denali Ultimate. Contact Weirs GMC for current pricing. Which 2027 Sierra trim is best for Maine winters? Any Sierra 1500 can be had with four-wheel drive for Maine winters. For deep snow, camp roads, and off-road, the AT4 or AT4X add serious capability; for luxury plus all-weather traction, the Denali is a popular pick. Reserve at Weirs GMC in Arundel and we'll spec the right one. Visit Weirs GMC Reserve Your 2027 Sierra 1500 in Arundel Only 8 on order — minutes from Biddeford, Kennebunk, and Portland. Reserve a 2027 Sierra Schedule a Test Drive Sierra 1500 Overview Get Pre-Approved Financing Value Your Trade-In Call 207-600-1088

GMC Sierra 1500 · Buying Guide Is July the Best Time to Buy a GMC Sierra in Southern Maine? This July, yes — and it's not close. GM's Employee Pricing event plus stackable rebates make right now one of the strongest windows of the year to buy a Sierra 1500. See This Month's Sierra Offers Why Now The Short Answer Why July Is a Strong Time to Buy Timing a truck purchase usually comes down to two things: the incentives on the hood and the selection on the lot. Right now, both line up. Through early August, GM is running Employee Pricing on every Sierra 1500 — and at Weirs GMC in Arundel, you can stack that with 0% APR or trade it for thousands in rebates. That combination doesn't show up every month. Summer is also when Southern Maine buyers actually put a truck to work — hauling to camp, towing the boat to the ramp, gravel runs on the back roads around Biddeford and Kennebunk. Buying now means you own it for the whole season, not after it ends. See exactly what's available on our Sierra Below Employee Pricing page, or start broad at Find My GMC Truck. The Case for Now What Makes This Window Different Factor Why It Matters in July 2026 Employee Pricing Preferred, below-MSRP price on every Sierra 1500 — limited-time 0% APR Available for 36 months and stacks with Employee Pricing (A+/A1)* Rebates Up to $7,250 combined if you take cash instead of the rate Selection 25MY and 26MY both in stock — widest trim choice before fall Use it now Own it for boating, camp, and hauling season, not after *Well-qualified A+/A1 credit-tier buyers financing through GM Financial; program July 1 – August 3, 2026; subject to change. Contact us for current numbers. Our Quick Take Should You Buy Now or Wait? Want the biggest discount →  Buy now — Employee Pricing plus rebates rarely stack this well later in the year. Need it for summer towing/hauling →  Buy now — waiting means missing the season you'd use it most. Chasing a specific trim or color →  Buy now — selection is widest before fall model-year churn. Not in a hurry at all →  At least lock your number now; incentives change month to month and may not be this strong. See This Month's Sierra Deal FAQ Best Time to Buy Questions Is July really a good time to buy a Sierra? This July, yes. GM's Employee Pricing event runs July 1 through August 3, 2026, and at Weirs GMC you can stack it with 0% APR or take up to $7,250 in rebates instead. That combination of a below-MSRP price plus strong financing or cash is one of the best windows of the year. See the current offers. Will the deals get better if I wait until fall? There's no guarantee. Incentives change every month, and Employee Pricing is a limited-time event. Fall can bring model-year clearance on leftover units, but selection shrinks and the specific Employee Pricing + rebate stack available now may not return. If you want a particular trim, now is the safer bet. Is it better to buy at the end of the month? End of month can help because sales targets are in play, but the bigger lever right now is the manufacturer program itself — Employee Pricing and the rebate stack apply all month. We'll always work to sharpen your number regardless of the calendar date. Should I buy now or order a truck? If a truck on our lot fits, buying now captures this month's incentives immediately. Ordering can make sense for a very specific build, but incentives apply at delivery and may differ by then. We can walk you through both at our Arundel showroom. Does buying in summer help with my trade? Trucks and SUVs tend to hold strong demand year-round in Maine, and this month's Trade Assist adds dealer cash on top of your trade's value on the rebate path. Bring your trade in and we'll appraise it while you look. How long does the current program last? The Employee Pricing program runs July 1 through August 3, 2026, and is subject to change. Inventory moves fast during these events, so the earlier you come in, the better your selection. Visit Weirs GMC Buy Your Sierra This Summer in Arundel Employee Pricing, 0% APR, or up to $7,250 off — while selection is widest. Minutes from Biddeford, Kennebunk, and Portland. Shop Sierra 1500 Inventory Schedule a Test Drive This Month's Sierra Offers Sierra Engine Guide Value Your Trade-In Call 207-600-1088