Allen Tillery Buick GMC | Specs
2027 GMC Sierra 1500 Specs Hot Springs AR
The 2027 GMC Sierra 1500 in Hot Springs, AR offers a 481-hp 6.6L V8 and Crew Cab beds with 62.9 or 71.7 cubic feet of cargo space.
Quick Answer
- The 2.7L TurboMax reaches peak torque of 455 lb-ft at 3,000 rpm.
- A 6.6L V8 Crew Cab AT4X 4WD with the short bed has a 6,050-lb base curb weight.
- The EPA rates the 3.0L Duramax Sierra 2WD at 22 city and 27 highway mpg.
- The 6.6L V8 has a 34-gallon fuel tank.
Engine and Powertrain Specifications
| Engine | Horsepower | Torque | Axle ratio |
|---|---|---|---|
| 2.7L TurboMax | 350 hp at 5,200 rpm | 455 lb-ft at 3,000 rpm | 3.42:1 |
| 5.7L V8 | 402 hp at 5,500 rpm | 428 lb-ft at 4,300 rpm | 3.23:1 |
| 6.6L V8 | 481 hp at 5,800 rpm | 501 lb-ft at 4,000 rpm | 3.23:1 |
| 3.0L Duramax | 305 hp at 3,750 rpm | 495 lb-ft at 2,750 rpm | 3.23:1 |
The 10-speed automatic uses a 4.70:1 first gear and a 0.64:1 tenth gear. Both V8s use direct and port injection. The TurboMax has direct injection and a cast-aluminum block with iron liners. The Duramax is an inline-six with dual overhead camshafts and four valves per cylinder.
Exterior Dimensions and Vehicle Weights
| Cab and drivetrain | Bed | Length |
|---|---|---|
| Regular Cab 2WD/4WD | Standard | 212.1 in |
| Regular Cab 2WD/4WD | Long | 230.9 in |
| Double Cab 2WD/4WD | Standard | 233.1 in |
| Crew Cab 2WD/4WD | Short | 233.1 in |
| Crew Cab 4WD | Standard | 242.6 in |
GMC lists approximately 81.4 inches of body width and 96.9 inches with the mirrors included. Height ranges from about 75.2 to 79.6 inches, depending on trim and drivetrain. GMC shows a 147.44-inch wheelbase for the short-bed Denali Crew Cab. The short-bed AT4 Crew Cab 4WD has 11.92 inches of ground clearance in GM order-guide figures reported for that configuration.
| Engine and configuration | Curb weight |
|---|---|
| 2.7L Regular Cab 2WD, standard bed | 4,590 lbs |
| 2.7L Crew Cab 4WD, short bed | 5,080 lbs |
| 5.7L Crew Cab 4WD, short bed | 5,310 lbs |
| 6.6L AT4X Crew Cab 4WD, short bed | 6,050 lbs |
| 3.0L AT4X Crew Cab 4WD, short bed | 6,210 lbs |
| Configuration | GVWR |
|---|---|
| Regular Cab 2WD, standard bed | 6,900 lbs |
| Double Cab 4WD, standard bed with Max Trailering | 7,450 lbs |
| AT4X Crew Cab 4WD, short bed | 7,500 lbs |
Interior Dimensions and Cargo Bed Volume
| Cab | Maximum seating | Front headroom | Front legroom |
|---|---|---|---|
| Regular | 3 | 43.18 in | 44.37 in |
| Double | 5 | 42.67 in | 44.37 in |
| Crew | 6 | 43.07 in | 44.37 in |
The Sierra cab and bed guide shows the short bed at 62.9 cubic feet, standard bed at 71.7 and long bed at 89.1. The long bed is a Regular Cab option. The Crew Cab offers a short bed in 2WD or 4WD and a standard bed in 4WD.

Wheels, Tires and Suspension
| Trim | Equipment |
|---|---|
| Pro | 17-inch steel wheels |
| Elevation | 20-inch gloss-black aluminum wheels |
| AT4 | 34-inch all-terrain tires and monotube shocks |
| AT4X | 35-inch mud-terrain tires and Multimatic DSSV dampers |
| Denali | 20-inch aluminum wheels and Adaptive Ride Control |
| Denali Ultimate | 22-inch diamond-cut aluminum wheels |
EPA Fuel Economy and Fuel Tank Sizes
| Engine and configuration | City mpg | Highway mpg | Combined mpg |
|---|---|---|---|
| 5.7L V8 2WD | 15 | 19 | 17 |
| 5.7L V8 4WD | 15 | 18 | 16 |
| 5.7L V8 4WD mud-terrain tires | 14 | 16 | 14 |
| 6.6L V8 4WD | 14 | 18 | 15 |
| 6.6L V8 AT4X 4WD | 13 | 15 | 14 |
| 3.0L Duramax 2WD | 22 | 27 | 24 |
| 3.0L Duramax 4WD | 20 | 23 | 21 |
| 3.0L Duramax 4WD mud-terrain tires | 20 | 22 | 20 |
| 3.0L Duramax AT4X 4WD | 20 | 22 | 21 |
GMC pairs the 6.6L V8 with a 34-gallon tank. The Duramax has a 24-gallon standard tank and an available 34-gallon tank on eligible trucks. The TurboMax uses 24 gallons in the configurations covered by the manual except the long box, which holds 28 gallons.
Key Features for Daily Driving
The 16.3-inch display in Elevation articulates to reveal a hidden storage compartment. Denali Ultimate adds an 11.5-inch front passenger display and a 15-inch head-up display. GMC lists electric rack-and-pinion steering and 13.5-inch front brake rotors in its chassis specifications.
Safety Equipment and Driver Assistance
Intersection Automatic Emergency Braking can assist when the truck detects a potential intersection collision. Rear Cross Traffic Braking can apply the brakes for detected traffic while reversing. The 2027 Sierra also includes Front Pedestrian and Bicyclist Braking and Adaptive Cruise Control.
GMC Limited Warranty Coverage
The bumper-to-bumper limited warranty covers qualifying defects for 3 years or 36,000 miles, whichever comes first. The typical GMC powertrain limited warranty is 5 years or 60,000 miles, whichever comes first, with terms depending on vehicle and engine.
2027 Sierra 1500 Dimensions in Practice
At approximately 242.6 inches long, a standard-bed Crew Cab 4WD takes about 9.5 inches more parking length than a short-bed Crew Cab. The 2-inch factory lift on AT4 and AT4X gives those trucks a different stance on Highway 7 and around the Ouachita Mountains.
Allen Tillery Buick GMC serves Arkadelphia, Hope and Bryant from 4573 Central Ave in Hot Springs, AR. Shoppers from Mena and El Dorado can call (501) 881-4160 to confirm which cab and drivetrain combinations are listed in Sierra 1500 inventory.
2027 GMC Sierra 1500 Specs FAQ
How wide is the 2027 GMC Sierra 1500?
GMC lists the Sierra at about 81.4 inches wide without mirrors and 96.9 inches with mirrors. Overall height varies from approximately 75.2 to 79.6 inches by trim and drivetrain. GMC lists the short-bed Crew Cab at approximately 233.1 inches long.
How much does a 2027 Sierra 1500 weigh?
A 2.7L TurboMax Regular Cab 2WD with the standard bed has a base curb weight of 4,590 lbs. GMC lists a 6.6L AT4X 4WD Crew Cab with the short bed at 6,050 lbs. Options and equipment affect the finished truck weight.
How much front legroom does the 2027 Sierra have?
GMC lists 44.37 inches of front legroom in Regular, Double and Crew Cab models. Front headroom varies with the cab. The published Crew Cab figure is 43.07 inches and the Double Cab has 42.67 inches. The Crew Cab can seat up to six.
What is the highway MPG of a 2027 Sierra 1500 diesel?
The EPA rates the 3.0L Duramax at 27 mpg highway in 2WD and 23 mpg highway in the regular 4WD listing. The separate AT4X diesel 4WD listing is rated 22 mpg highway. The diesel is offered with an available 34-gallon tank on eligible configurations.
What is the difference between curb weight and GVWR?
Base curb weight describes the truck itself in a stated configuration. GVWR is the maximum allowed weight for the loaded truck. GMC gives the short-bed AT4X a 7,500-lb GVWR. The 3.0L AT4X weighs 6,210 lbs at base curb weight.
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Allen Tillery Buick GMC is at 4573 Central Ave in Hot Springs.
May not represent actual vehicle. (Options, colors, trim and body style may vary)
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