GMC just gave the Sierra 1500 its most substantial overhaul since the current design arrived for 2022. The 2027 Sierra 1500 launches before the end of the 2026 calendar year with two all-new V8 engines, a six-trim lineup, and starting prices that run from $51,295 for the work-focused Pro to $87,895 for the Denali Ultimate flagship, destination included on all figures. For context, the outgoing 2026 Sierra opened at $38,300, meaning the entry point has moved up substantially as GMC front-loads more standard content across every trim.
The powertrain story is the clearest break from the prior generation. The outgoing 5.3L V8 and 6.2L V8 are out; in their place come two sixth-generation Small Block engines built on a clean sheet. The 5.7L V8 makes 402 hp and 428 lb-ft of torque, rated for up to 13,500 pounds of maximum trailering in Double Cab form when properly equipped. Above it sits the 6.6L V8 at 481 hp and 501 lb-ft, which GMC positions as the most powerful naturally aspirated V8 in the half-ton segment and the largest-displacement V8 in class. Both displace more than the engines they replace, and both use a dual-fuel injection system combining direct and port injection alongside higher compression ratios and larger throttle bodies than the outgoing units. The 6.2L V8 in the 2026 model produced 420 hp; the new 6.6L adds 61 hp over that figure.
Below the V8s, the 2.7L TurboMax four-cylinder returns in enhanced form, now producing 350 hp and 455 lb-ft of torque. That’s an increase of 40 hp and 25 lb-ft versus the current TurboMax, achieved through a new turbocharger, upgraded fuel injection, revised pistons, and improved thermal management. GMC claims best-in-class standard torque for the TurboMax, which makes it a reasonable consideration for buyers who tow occasionally but want better everyday fuel economy. The Duramax 3.0L turbo-diesel rounds out the lineup at 305 hp and 495 lb-ft, with class-exclusive status in the half-ton segment. Paired with the available 34-gallon fuel tank, GMC estimates more than 900 miles of highway range on a single fill, though that figure comes from GM’s own testing rather than EPA certification. All four engines mate to a 10-speed automatic transmission.
Six Trims, Four Distinct Missions
The lineup is structured around six trims, each pulling in a different direction. The Pro at $51,295 is the work truck: TurboMax standard, full safety suite including Adaptive Cruise Control and Intersection Automatic Emergency Braking, the 16.3-inch infotainment screen, and trailer brake controller. It’s the only trim that doesn’t get Super Cruise as a standard or easily available feature, though the 5.7L V8 and diesel are available options.
The Elevation at $59,995 adds articulating infotainment screen with hidden storage behind it, the MultiPro center console with workstation, dual MagSafe wireless charging, bucket seats, and X31 off-road content on applicable configurations. Super Cruise is available as a package add, making this the trim where buyers can get hands-free highway driving without stepping into the off-road or luxury tiers.
AT4 at $73,495 is where the off-road hardware begins in earnest. Standard equipment includes a 2-inch factory lift with monotube shocks, 34-inch all-terrain tires, the 5.7L V8, Super Cruise with trailering capability, 12-way power heated and ventilated front seats, panoramic sunroof, Head-Up Display, and an 8-speaker Bose audio system. The Duramax diesel is available, as is a technology package adding the 11.5-inch front passenger screen with articulating cover and underbody cameras.
At $85,495, the AT4X is the off-road flagship. It comes standard with the Duramax 3.0L diesel, the 34-gallon fuel tank, 35-inch Goodyear Wrangler Territory MT tires, Multimatic Jounce Control Dampers replacing the monotube shocks, and front and rear electronic locking differentials. That combination of front and rear e-lockers with no equivalent in the competitive set is GMC’s primary claim for the AT4X’s off-road credibility. A new Baja drive mode optimizes throttle response, gear selection, damper tuning, and stability control for high-speed desert running. Interior trim is exclusive Timber Mahogany with a flat-bottom steering wheel, enhanced seat bolstering, and a 16-speaker Bose system with head-restraint speakers. The 6.6L V8 is available if buyers want the extra horsepower over the diesel. An AEV Edition adds front and rear bumpers, skid plates, recovery hooks, beadlock-capable 18-inch wheels, and dual downturn exhaust, though that package carries late availability.
Denali at $76,795 sits between the AT4X and Denali Ultimate in price, prioritizing road manners over trail hardware. It gets the 5.7L V8 standard, Denali Premium Suspension, Super Cruise, Birch Wood accents, and three interior colorways. The 6.6L V8 and diesel are both available. Denali Ultimate at $87,895 is the capstone: standard 6.6L V8, 14-way massaging front seats, 16-speaker Bose audio with class-exclusive head-restraint speakers, the articulating 16.3-inch center display, a 15-inch Head-Up Display, an 8.5-inch Rear Camera Mirror, underbody cameras with wash systems, forged birch wood trim, 22-inch diamond-cut wheels, and MultiPro Power Steps. GMC claims more than 60 inches of combined digital displays in the Denali Ultimate, the most in class when the 11.5-inch passenger screen is included.
Technology and Driver Assistance
The new GM user interface is a significant departure from what the outgoing Sierra offered. The 16.3-inch center screen is the largest in the full-size truck segment, with a reimagined split-view home screen and 3D visualization for navigation and vehicle status. The 12.2-inch Driver Information Center configures into Clean, Minimalist, Central Gauge, and Tow/Haul layouts, with an optional Dynamic Display mode on Super Cruise-equipped trucks. An available 11.5-inch front passenger display uses polarized technology to keep content visible only to the passenger. Google built-in integration brings Google Gemini, Google Maps, and Google Play apps, with over-the-air update capability. Android Auto and Apple CarPlay are integrated alongside the native interface.
Super Cruise with trailering capability is standard on AT4, AT4X, Denali, and Denali Ultimate, and available on the Elevation. The system supports Automatic Lane Change and Turn Signal Initiated Lane Change on compatible roads. Three years of OnStar One service come with every Super Cruise-equipped truck. A new Trailer Brake Gain Assistant is available, described as an industry first for half-ton trucks.
The camera suite goes deep. Up to 19 views are available across the lineup, including Cabin Glance, Hitch View, transparent trailer overlay, and front and rear underbody cameras with integrated wash systems. Mobile trailer-light checks run through the infotainment display. Six USB ports, a 120-volt outlet, HDMI access, dual MagSafe wireless charging, and available 5G connectivity round out the connectivity hardware.
Configurations and Timing
The published pricing reflects 4WD Crew Cab configurations. Regular Cab and Double Cab configurations are confirmed but GMC has not announced pricing or full option availability for those body styles beyond noting they will be detailed as production expands. Bed lengths vary by cab and engine combination, with 5-foot-6, 6-foot-6, and 8-foot options available depending on configuration.
The first 2027 Sierra 1500 models reach GMC dealers before the end of 2026. Ford F-Series and Ram Pickup remain the primary competitive targets in a segment where specification depth and technology content have become as important as raw towing numbers.
| Engine | Max Payload (4WD) | Max Trailering (4WD) |
|---|---|---|
| 2.7L TurboMax | 2,020 lb | 8,800 lb |
| 3.0L Duramax Diesel | 1,790 lb | 12,100 lb (with NHT) |
| 5.7L V8 | 1,920 lb | 13,300 lb (with NHT) |
| 6.6L V8 | 1,450 lb | 9,400 lb |
The 6.6L V8’s payload number reflects the heavier trim levels that it is available in and is restricted to the Crew Cab configuration; buyers who need maximum payload will find the TurboMax or 5.7L V8 more useful. The 6.6L’s value proposition is straight-line performance and the bragging rights that come with 481 hp in a half-ton. GMC built the new Sierra around a truck buyer who wants more of everything simultaneously, and the six-trim spread makes that argument from the $51,295 Pro to the $87,895 Denali Ultimate. The 6.6L V8 will sell the headlines. The 5.7L, which carries more payload and tows more, is the one that will sell the trucks.
Source: GMC. Images courtesy of GMC.
