2021 GMC SIERRA 3500HD

If you're searching for a heavy-duty workhorse that doesn't sacrifice luxury, this 2021 GMC Sierra 3500HD Denali for sale at Prestige Motors Pasco in Pasco, WA is exactly what you've been looking for. Finished in a commanding Onyx Black exterior, this Crew Cab diesel powerhouse brings together serious towing capability and premium refinement in one package — and it's ready for a new owner in Franklin County today.

About This 2021 GMC Sierra 3500HD Denali

This 2021 Sierra 3500HD Denali (Stock #19995, VIN: 1GT49WEY3MF119608) comes in at 137,380 miles, which for a diesel-powered heavy-duty truck is well within the range that experienced truck buyers expect. Duramax diesel engines are widely known to run reliably well into the 300,000-plus mile range with proper maintenance, meaning this truck likely has a significant portion of its working life still ahead of it. The 4WD drivetrain makes it equally capable on Eastern Washington's dry summer roads and its icy winter conditions. Whether you're hauling equipment across Franklin County or heading out to the Columbia Basin for a long work week, this Sierra is built for it.

2021 GMC Sierra 3500HD Performance and Engine

Under the hood, you'll find GMC's legendary Duramax 6.6L V8 Turbodiesel engine paired with a 10-speed automatic transmission — a combination that makes this truck one of the most capable heavy-duty pickups on the market. The Duramax L5P produces 445 horsepower and 910 lb-ft of torque in this generation, giving the Sierra 3500HD a maximum conventional towing capacity of up to 20,000 lbs and a payload capacity that satisfies the most demanding job sites. The 10-speed Allison-integrated automatic transmission delivers smooth, confident power delivery whether you're climbing a grade with a loaded gooseneck or cruising empty down the highway. The 4WD system provides true all-terrain confidence year-round.

GMC Sierra 3500HD Denali Features and Interior

The Denali Difference

The Denali trim sits at the top of the Sierra lineup, and it shows. Inside the Crew Cab, you'll find genuine leather-appointed seating, heated and ventilated front seats, a heated steering wheel, and wood-grain interior accents that give this work truck a distinct executive feel. The large 13.4-inch diagonal infotainment display — or the available multi-display setup in this generation — comes loaded with GMC's latest technology including wireless Apple CarPlay and Android Auto, a premium Bose audio system, and built-in navigation.

Safety and Technology

The 2021 Sierra 3500HD Denali also brings advanced driver assistance features including forward collision warning, automatic emergency braking, lane keep assist, and a suite of camera views designed specifically to help when trailering. GMC's ProGrade Trailering System and the available 15-camera transparent trailer view make hitching up and maneuvering with a trailer far less stressful than older systems.

GMC Sierra 3500HD Reliability and Ownership

The Duramax diesel engine has earned a sterling reputation over decades of real-world use. Owners regularly report passing the 250,000 to 400,000 mile mark with routine maintenance — oil changes, fuel filter replacements, and DEF system upkeep being the primary recurring items. The 6.6L L5P Duramax generation found in the 2021 model addressed many of the concerns buyers had with earlier emissions systems, making it one of the most refined and reliable diesel pickups available. Franklin County buyers who rely on their trucks day in and day out will appreciate that this isn't a truck that nickels and dimes you — it's one built to work as hard as you do. At 137,380 miles, a well-maintained example like this is in the early-to-mid portion of its viable service life.

Why Buy From Prestige Motors Pasco in Pasco, WA

Prestige Motors Pasco is a trusted used vehicle dealer located in Pasco, in Franklin County, Washington. Buyers throughout the Tri-Cities region and surrounding Eastern Washington communities choose Prestige Motors Pasco because of their straightforward approach to used vehicle sales — no high-pressure tactics, just honest information about real vehicles. The team understands what Franklin County truck buyers need, and they stock inventory that reflects the demands of this working region. From farm country to construction sites, they know what a capable diesel truck means to their customers.

Financing a Used GMC Sierra 3500HD Near Pasco

Financing a diesel heavy-duty truck is a significant purchase, and Prestige Motors Pasco works with a range of lenders to help buyers throughout the Pasco area get into the right vehicle at a payment that makes sense. Whether you have excellent credit, are rebuilding, or are somewhere in between, the finance team will work to find a solution that fits your situation. Self-employed buyers, small business owners, and contractors in Franklin County may also have options for business-use vehicle financing. Give them a call at 509-416-5700 to discuss your options before you even set foot on the lot.

Frequently Asked Questions

Is the 2021 GMC Sierra 3500HD Denali a good buy?

Yes — the 2021 Sierra 3500HD Denali is widely regarded as one of the best heavy-duty trucks on the market. The Duramax diesel engine is one of the most reliable in its class, and the Denali trim adds a level of luxury and technology that makes it usable as a daily driver even when it's not working hard. For buyers who need genuine heavy-duty capability with premium features, it's an excellent choice.

How many miles is too many on a Duramax diesel?

Duramax diesel engines are built to last well beyond 300,000 miles with proper maintenance. At 137,380 miles, this 2021 Sierra 3500HD is still well within what experienced diesel truck buyers consider a mid-life vehicle. The key factors are maintenance history, fuel filter changes, and DEF system care — all routine items for this engine.

What does the Sierra 3500HD Denali trim include?

The Denali trim is GMC's top-tier luxury trim for the Sierra heavy-duty lineup. It includes premium leather seating, heated and ventilated front seats, a heated steering wheel, Bose premium audio, advanced driver assistance systems, the ProGrade Trailering System, chrome exterior accents, 20-inch chrome wheels, and a high-resolution infotainment system with wireless smartphone integration — among many other features.

What is the towing capacity of the 2021 GMC Sierra 3500HD?

The 2021 GMC Sierra 3500HD with the Duramax 6.6L turbodiesel is rated to tow up to approximately 20,000 lbs when properly equipped for conventional towing, and up to 23,500 lbs for fifth-wheel or gooseneck applications depending on configuration. It is one of the highest-rated heavy-duty trucks in its class for towing capacity.

Is it worth buying a high-mileage diesel truck?

For buyers who understand diesel maintenance, a well-maintained high-mileage diesel truck can be an excellent value. Unlike gasoline engines, diesel powerplants are engineered for long-haul durability. The Duramax 6.6L in the Sierra 3500HD is a prime example — 137,000 miles is considered by many diesel enthusiasts to be the point where an engine is just getting broken in, provided the maintenance record is solid.

Serving Pasco and Surrounding Areas

Prestige Motors Pasco is centrally located in Pasco, in Franklin County, making it easily accessible for buyers throughout the entire Tri-Cities area and beyond. Customers regularly make the drive from Kennewick, Richland, West Richland, Connell, Othello, Prosser, and Walla Walla to shop the inventory at Prestige Motors Pasco. Whether you're coming in from the agricultural communities of the Columbia Basin or the suburban neighborhoods closer to the Tri-Cities metro, the dealership is a quick and convenient drive along the I-182 corridor. If you've been searching for a used GMC Sierra 3500HD in Franklin County, Washington, this is a vehicle worth seeing in person.

Contact Prestige Motors Pasco Today

Don't let this 2021 GMC Sierra 3500HD Denali in Onyx Black sit on the lot for long — trucks like this at this price point move fast. Contact Prestige Motors Pasco today at 509-416-5700 to schedule your test drive, ask about current pricing, or get pre-approved for financing. The team at Prestige Motors Pasco in Pasco, WA is ready to help you drive home in the heavy-duty diesel truck you've been looking for. Visit us in Pasco, in Franklin County, and experience the Denali difference for yourself.