• Four engine options available, providing durability, efficiency and lower operating expenses.
  • 9-liter PACCAR PX-9 engine: High power-to-weight ratio, suitable for heavy payloads (260 to 450 horsepower, up to 1,250 lb.-ft. of torque)
  • 7-liter PACCAR PX-7 engine: Superior performance, minimized costs and increased uptime for medium-duty customers (260 horsepower and up to 750 lb.-ft. of torque)
  • Two natural gas alternatives include the Cummins L9N engine (250-320 horsepower, 660-1,000 lb.-ft. of torque) and the Cummins B6.7N engine (200-240 horsepower, 520-560 lb.-ft. of torque)
• PACCAR TX-8 automatic transmissions: Optimize PX engines for medium duty applications, with a maximum torque rating of 1,000 lb.-ft., best-in-class power-to-weight ratio and up to 5% fuel savings compared to competitors
• Other transmissions options are available from Allison Automatics and Eaton, including manual and UltraShift

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The Model 537’s cab, hood and chassis components are built tough. The VMUX multiplex electrical system provides common electrical architecture for seamless body integration and advanced programming for a wide variety of applications. Visibility is excellent as a result of the large windscreen, sloped hood, large mirrors and an industry-leading forward lighting system that provides superior light coverage and beam uniformity. Other exterior features include:

• Three Bumper Options: One-piece channel painted or chrome, one-piece aero composite painted and in-mold color, and three-piece aero metal
• High-Performing Halogen Headlights: For excellent light coverage and excellent serviceability
• Hood Options: SMC aero hoods in 107" and 109" BBC configurations, both designed to maximize visibility
• Sturdy Fixed Grille: Available for the 109" BBC FEPTO. The grille is stationary, has pull through rails and a 24” bumper extension for front end mounted equipment
• Robust Cab-Mounted Mirrors: For optimized visibility and durability
• Mirrors: Large flat glass and integrated convex mirrors with available heating elements and motorized glass
• Fuel Tanks: D-shaped to maximize volume in a small space in sizes from 50 to 100 gallons
• Battery Box: Under-the-cab battery box features best-in-class stair-style steps for easy cab entry

New LED headlights are available on Peterbilt Medium Duty Trucks. The new LED headlight option provides numerous benefits including:  

• Enhanced Visibility: Experience greater light output, increased range, and wider beam spread, ensuring optimal visibility on the road. 
• Reduced Glare: Our low-beam headlights are designed to minimize glare to oncoming traffic, surpassing the requirement by 28 percent. 
• Extended Reach: With high-beam headlights that radiate 65 percent further than traditional halogen lights, you can navigate the road with confidence and clarity.
• Energy Efficiency: Enjoy the benefits of high performance while conserving energy, as our LED headlights consume only half the power of conventional halogen lights. 

The interior of the Model 537 is ideal for driver comfort and safety with:

• The New, 7" Peterbilt Digital Display: The largest in the medium duty market
• Integrated Collision Mitigation Technology: For added protection in challenging driving conditions
• Easy-to-Reach Multiplexed Switches: Optimally located to reduce driver fatigue
• New, Contoured Multi-Function Steering Wheel: With cruise control, audio and display controls at the driver’s fingertips
• Wider Cab: 2.1-meter cab with ample room for three
• Lower Cab Floor: 3.5” inches lower than previous models for easier ingress and egress
• LED Dome Light: With two reading lights and ambient lighting
• Multi-Functional B-panel: Configurable for any application and available with storage bin, auxiliary gauges or switches, or a flat panel for aftermarket equipment
• 6.1 cu. ft. of Storage: Including header storage with removable trays, a passenger storage bin, driver-side door map pockets, three storage hooks for small items and additional storage in the center console
• Kick Panels & Plates: Dark kick panels are standard and metal door kick plates are available
• 3-Person Seating: With a bench seat that features best-in-class storage volume and easy access from inside and outside the cab
• Enhanced, Removable Center Console: Includes deep, large cup holders, two USB and two 12V ports