1999 PETERBILT 379

If you've been searching for a legendary heavy-duty workhorse with low miles and serious muscle, this 1999 Peterbilt 379 for sale at You First Autos in Costa Mesa, California is exactly what you've been looking for. With only 55,484 miles on the odometer and a massively capable 14.6-liter inline-six diesel engine under that iconic hood, this classic American truck is ready to go back to work — or become the centerpiece of your fleet. Stock #9997 is a rare find in any market, let alone right here in Orange County.

About This 1999 Peterbilt 379

The Peterbilt 379 is widely regarded as one of the most iconic and sought-after Class 8 trucks ever built, and this example stands out for one very compelling reason: the mileage. At just 55,484 miles, this 1999 model has barely scratched the surface of what a properly maintained Peterbilt 379 can deliver. These trucks are built to run well into the millions of miles when cared for, which means a low-mileage example like this one represents an extraordinary value proposition for owner-operators and fleet buyers alike. Whether you're replacing aging equipment or adding a proven platform to your operation, this truck deserves a close look.

1999 Peterbilt 379 Performance and Engine

14.6-Liter Inline-Six Diesel Power

Under the long, classic hood of this Peterbilt 379 sits a 14.6-liter (893 cubic inch) inline-six diesel engine — a configuration synonymous with raw, dependable pulling power. Engines of this displacement class in the 379 platform were designed to handle the most demanding long-haul and heavy freight applications in North America. The 6x4 drivetrain configuration provides optimal traction and load distribution, making this truck well-suited for everything from flatbed hauling to heavy equipment transport.

The automatic transmission makes this truck more accessible to a wider range of drivers while reducing operator fatigue on long routes — an increasingly valued feature in fleet operations and owner-operator settings alike. In combination with the 6x4 axle setup, this powertrain delivers the kind of confident, reliable performance that Peterbilt built its century-long reputation on.

Peterbilt 379 Features and Interior

The 1999 Peterbilt 379 was built during what many enthusiasts consider the golden era of American trucking design. The extended hood, chrome detailing, and classic cab styling aren't just cosmetic — they reflect a philosophy of purpose-built durability. The cab layout on the 379 was designed for long-haul comfort, offering a driver-focused environment with straightforward controls and a commanding seating position that gives operators excellent road visibility.

The 379's interior was built to work as hard as the driver, with durable materials and a logical, no-nonsense dashboard layout. Buyers interested in this specific unit should contact You First Autos directly for a full condition report and interior walkthrough, as features can vary based on how individual trucks were spec'd and optioned from the factory.

Peterbilt 379 Reliability and Ownership

Ask any experienced trucker about the Peterbilt 379 and you'll hear the same thing: these trucks simply don't quit. Produced from 1987 through 2007, the 379 earned a near-mythical reputation for longevity and reliability. The combination of a robust frame, proven diesel powertrains, and accessible mechanical design made it a favorite among owner-operators who needed a truck they could maintain themselves and depend on day in and day out.

Large-displacement diesel engines like the 14.6-liter unit in this truck were engineered for commercial duty cycles with lifespans measured in the hundreds of thousands — and in many cases, millions — of miles. At 55,484 miles, this engine is, by commercial trucking standards, essentially still in its infancy. Parts availability for the 379 remains strong thanks to its long production run and massive installed base, and a thriving aftermarket ecosystem supports everything from routine maintenance to full rebuilds.

Why Buy From You First Autos in Costa Mesa, California

You First Autos, located in Costa Mesa in the heart of Orange County, California, brings a straightforward, buyer-focused approach to commercial vehicle sales. The name says it all — this dealership puts customers first, working to match buyers with the right vehicle at the right price without the runaround. Whether you're a seasoned fleet manager or an owner-operator purchasing your first truck, the team at You First Autos is equipped to answer your questions and walk you through the purchase process with transparency.

Costa Mesa's central location in Orange County puts You First Autos within easy reach of buyers throughout Southern California, with convenient access from major freeways connecting the region.

Financing a Used Peterbilt 379 Near Costa Mesa

Financing a commercial truck doesn't have to be complicated. You First Autos works with buyers at a range of credit levels to explore financing options that fit real-world budgets. Whether you're an established business with strong credit or an owner-operator working to build your financial profile, it's worth having a conversation about what's available.

Buyers from across Orange County and the greater Southern California area have made the trip to Costa Mesa to work out deals on commercial vehicles. Call the team at You First Autos at 714-329-0861 to get pre-qualified or ask about current financing programs before you make the drive.

Frequently Asked Questions

Is the 1999 Peterbilt 379 a good buy?

Absolutely. The Peterbilt 379 is one of the most respected Class 8 trucks ever manufactured, with a reputation for exceptional durability and longevity. A 1999 model with only 55,484 miles is an especially compelling opportunity given how much useful life remains in the drivetrain and frame.

How many miles is too many for a Peterbilt 379?

For a well-maintained Peterbilt 379, most experienced buyers don't start worrying until well past 500,000 miles — and plenty of these trucks have crossed the million-mile mark. At 55,484 miles, this truck is extraordinarily low-mileage by commercial trucking standards.

What engine does the 1999 Peterbilt 379 have?

This specific truck is equipped with a 14.6-liter (893 cubic inch) inline-six diesel engine paired with an automatic transmission and a 6x4 drivetrain — a proven heavy-duty configuration built for demanding commercial applications.

Is the Peterbilt 379 still being produced?

No. Peterbilt discontinued the 379 in 2007 after a 20-year production run. Because of its iconic status, low-mileage examples in good condition are increasingly difficult to find, which adds to the appeal of a truck like this one.

Where can I see this 1999 Peterbilt 379 in person?

This truck is available at You First Autos in Costa Mesa, California. Call 714-329-0861 to schedule a viewing or ask about the truck's full condition and history before making the trip.

Serving Costa Mesa and Surrounding Areas in Orange County

You First Autos is proud to serve buyers throughout Costa Mesa and the greater Orange County region. Buyers regularly make the trip from nearby communities including Irvine, Santa Ana, Anaheim, Huntington Beach, Newport Beach, Fullerton, and Garden Grove to explore the inventory at You First Autos.

Southern California's thriving construction, logistics, and transportation industries create strong demand for reliable commercial trucks, and buyers from throughout the Los Angeles Basin and the Inland Empire have found their way to You First Autos in Costa Mesa to take advantage of deals like this one. Wherever you're coming from in the region, this low-mileage Peterbilt 379 is worth the drive.

Contact You First Autos Today

Don't let a low-mileage 1999 Peterbilt 379 like this one sit on the lot for long. Trucks of this caliber — with this little use on the clock — don't stay available. Call You First Autos today at 714-329-0861 to ask questions, schedule a walkthrough, or get started on financing. The team in Costa Mesa is ready to help you put this legendary American truck to work. Ask for Stock #9997 and take the first step toward ownership today.