2027 GMC Sierra 1500 in Highland, Indiana

Your next truck should fit the way you drive, the loads you carry and the miles you travel. Explore the next-generation 2027 GMC Sierra 1500 with Circle Buick GMC in Highland, serving Northwest Indiana. If highway travel and useful pulling power matter to you, put the 3.0L Duramax Turbo-Diesel on your comparison list.

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Why the 3.0L Duramax deserves a serious look

A higher diesel price on the station sign does not automatically mean a higher fuel bill for your truck. The number that matters is the cost of driving a mile: fuel price divided by miles per gallon. A diesel that travels farther on each gallon can offset a price premium at the pump. Your result depends on the trucks being compared, your routes and local prices.

The 2027 Sierra's 3.0L Duramax delivers 305 horsepower and 495 lb-ft of torque, paired with a 10-speed automatic transmission. GMC publishes peak torque at 2,750 rpm. That combination makes the engine worth considering for shoppers who value pulling power without choosing a heavy-duty truck. Compare the actual vehicle's ratings and take a test drive to judge how it responds.

More range for highway travel

GMC advertises more than 900 miles of available highway range with the 3.0L diesel and available approximately 34-gallon extended-range fuel tank. This is based on GM-estimated 27 highway mpg for a 2WD configuration; it is not a promise for every Sierra. Four-wheel drive, tires, load, speed, weather and towing affect actual results. The larger tank increases the fuel you can carry; it does not by itself improve mpg.

For drivers planning long interstate trips, fewer fuel stops can be a practical benefit even when fuel savings are modest. Ask Circle to confirm the tank, drivetrain and equipment on the truck you are considering.

Compare the engines around your priorities

The 2027 lineup includes TurboMax, 5.7L V8, 6.6L V8 and 3.0L Duramax diesel powertrains. Engine availability varies by configuration. Focus on how you use a truck: highway miles, trailer requirements, purchase price and driving feel. The diesel is a compelling option to evaluate, but there is no single best engine for every buyer.

Towing: check the truck, not just the engine name

GMC lists up to 12,100 pounds of maximum available towing for the 3.0L Duramax when properly equipped. That is a configuration-specific maximum, not the rating of every diesel Sierra. Confirm the actual truck's trailering information, payload label, hitch requirements and passenger and cargo load before selecting a trailer. Trailer tongue weight uses available payload.

Explore the 2027 Sierra trim lineup

Compare Pro, Elevation, AT4, AT4X, Denali and Denali Ultimate. GMC lists the 3.0L Duramax as standard equipment on the 2027 AT4X. Other trim and engine combinations should be confirmed against current manufacturer ordering information and the vehicle's window sticker.

Make a diesel decision with the full numbers

Compare the actual purchase-price difference, fuel cost per mile, expected annual mileage, DEF use and maintenance requirements. A high-mileage highway driver may value the diesel differently from someone making mostly short local trips. Circle can help you compare available configurations and review the numbers before you choose.

Read our 3.0L Duramax guide: why higher diesel prices do not tell the whole story.

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Visit Circle Buick GMC in Highland

Find us at 2440 45th Street, Highland, IN 46322. Contact our team for 2027 availability, equipment details and test-drive opportunities. Current inventory may include other model years; an inventory link does not confirm that a 2027 truck is in stock.

Frequently asked questions

Does higher diesel pricing make the Duramax a poor choice?

Not automatically. Compare fuel cost per mile and the complete ownership cost, then consider whether the engine's torque and available range fit your needs.

Is the 900-mile range an EPA rating?

The range claim uses GM-estimated highway fuel economy and a specific tank and drivetrain combination. Actual range varies; do not treat it as a towing-range or mixed-driving guarantee.

Can I confirm 2027 inventory online?

Review current listings and contact Circle to confirm model year, engine, equipment and availability.

Manufacturer information reviewed October 1, 2026. Specifications and availability may change. Sources: GMC 2027 Sierra 1500 and GMC 2027 specifications announcement. Consult the vehicle's labels, owner's manual and manufacturer trailering guide. Financing is subject to lender approval.