Peterbilt 379: The Ultimate Guide to the Specs, Features, Performance, Capabilities and Pricing

peterbilt 379

The Peterbilt 379 is an iconic American truck known for its power, reliability, and customizable options. This classic hauler has been a mainstay on highways for decades, beloved by drivers for its comfort and companies for its productivity. Let’s take a closer look at what makes the Peterbilt 379 so popular.

Why is the Peterbilt 379 so popular?

The Peterbilt 379 rose to fame in the 1980s and has remained one of the most sought-after trucks ever since. Drivers love the 379 for its versatility, durability, and comfort. It can be configured for long hauls or local deliveries. The durable chassis handles tough working conditions easily. Inside, the spacious cab offers a home away from home on the road. For many truckers, the 379 provides the perfect blend of power, reliability, and comfort.

peterbilt 379
Indianapolis – Circa March 2023: Navistar International Semi Tractor Trailer Truck display at a dealership. Navistar International is subsidiary of Traton.


Model Variations379, 379EXHD
HoodsAerodyne, AeroBullet, Classic
SuspensionSpring, Air ride
Transmission (Eaton Fuller)10-18 speed manual, 5-6 speed auto
Sleeper Size36″-86″
Interior Trim TypeVinyl, cloth, leather


The Peterbilt 379 interior combines practicality and comfort. The roomy cab has ample space for drivers over 6 feet tall. Available amenities include:

  • Air ride, air suspension seats
  • Tilt & telescoping steering column
  • Auto climate control
  • AM/FM radio w/ CD player
  • Power windows & door locks


379s come equipped with a range of powerful engine options:

  • Caterpillar C15 – Up to 625 HP, 2,050 lb-ft torque
  • Cummins ISX15 – Up to 600 HP, 2,050 lb-ft torque
  • Detroit DD15 – Up to 505 HP, 1,850 lb-ft torque
  • PACCAR MX-13 – Up to 510 HP, 1,850 lb-ft torque

peterbilt 379


To accommodate all kinds of routes, the 379 offers sleeper options ranging from 36″-86″:

Unibilt Sleeper Available in 36″, 48″, 63″, 70″, 78″ lengths
Customizable storage, appliances, amenities
Stratosphere SleeperAvailable in 63″, 73″, 86″ lengths 
Raised roof for extra headroom
Optional dinette
Platinum SleeperAvailable in 63″, 70″, 78″ lengths
Polished stainless panels
Residential mattress 
Computer workstation

All Peterbilt 379 sleeper options provide comforts like:

  • Bunk beds
  • Flat screen TVs
  • Fridges & microwaves
  • Heating & A/C
  • Audio & charging ports

All provide the comforts needed for extended trips: beds, storage, appliances, and more.

peterbilt 379

The customizable and still-reliable Peterbilt 379

One reason for the Peterbilt 379’s longevity is that it can be customized to suit specific applications. While keeping the strong frame and powertrain, you can specify components like the engine, transmission, axles, and sleeper. This versatility makes the 379 at home on jobs from regional hauling to heavy-duty vocational use. Even with custom configurations, the 379 maintains its reliability and efficiency.

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How much does a Peterbilt 379 cost?

As a fully customizable Class 8 tractor, 379 pricing varies based on configuration. On average, expect to pay:

  • New 379: $140,000-$180,000
  • Used 379: $40,000-$120,000
Year RangeTandem Axle priceTri-Axle price
1992-1994$14,200 – $21,600$30,000 – $34,200
1995-1997$15,500 – $23,900$35,500 – $39,500
1998-2000$17,100 – $26,100$41,000 – $44,700
2001-2004$18,600 – $29,200$46,600 – $51,000
2005-2007$20,500 – $31,200$50,000 – $90,000

The exact cost depends on factors like age, mileage, engine, and options. Work with a trusted Peterbilt dealer to build the ideal 379 for your needs and budget.

Year – Older 379s from the 1980s and 1990s are generally less expensive than newer models. Expect to pay more for trucks from the 2000s.

Mileage – Lower mileage trucks command higher prices. Under 200,000 miles is ideal.

Engine – The Cat, Cummins, Detroit, and PACCAR engine options have different MSRPs. Higher horsepower or newer engines cost more.

Axle/Suspension Config – Tandem axle 379s are less expensive than tri-drive models. Air ride suspension costs more than spring suspension.

Transmission – Automated manual transmissions are pricier than manual transmissions.

Sleeper – Larger, more amenity-loaded sleepers add cost. A 70″ Unibilt sleeper costs less than an 86″ Stratosphere sleeper.

Condition – Well-maintained 379s in good condition bring higher resale values. Minor repairs or damages reduce the price.

The successor to the Peterbilt 379

In 2007, Peterbilt rolled out the Peterbilt 389 to replace the 379. The 389 has an updated exterior design but retains the proven powertrains and customizability of its predecessor. Many fleets continue using 379s alongside newer 389s. With proper maintenance, the 379 has no set retirement age. Its durability and customizability ensure it will remain on the road for decades to come.


Q: What are some common Peterbilt 379 engine problems?

A: Some potential engine issues include EGR valve failure, fuel injector problems, and oil leaks. Proper maintenance helps minimize problems.

Q: Is the Peterbilt 379 automated manual or automatic transmission?

A: Drivers can choose automated manual or automatic transmissions on the 379. Automated manuals offer efficiency while automatics simplify driving.

Q: What is the Peterbilt 379’s towing capacity?

A: Towing capacity ranges from 20,000-30,000 lbs depending on configuration. The strongest options can tow up to 35,000 lbs.

Q: How long do Peterbilt 379 engines last?

A: Properly maintained Peterbilt 379 engines can log over 1 million miles. The exact lifespan depends on engine choice and driving conditions.

Q: Are Peterbilt 379 sleepers comfortable?

A: Yes, 379 sleepers prioritize comfort on long hauls. Expect amenities like bunk beds, flatscreen TVs, mini-fridges, and inverter microwaves.

Final Thought

The Peterbilt 379 became an icon thanks to its strength, comfort, and versatility. This custom-built tractor continues turning heads and pulling heavy loads today. Drivers love the 379’s blend of power and comfort. Fleets benefit from reliability and efficiency. With proper care, a Peterbilt 379 will maintain its productive performance for years to come.