2021-2025+
The Peterbilt 537 and 548 are part of Peterbilt’s latest medium- and heavy-duty vocational lineup, introduced in 2021. Both trucks share the 2.1-meter wide cab and are built for work truck versatility, with durable frame options and upgraded driver environments.
- Peterbilt 537: A Class 7 medium-duty truck, great for heavier regional and vocational work.
- Peterbilt 548: A more robust Class 8 vocational chassis, often spec’d with tandem axles and heavier-duty components.
These models are ideal for fleets and municipalities that need modern ergonomics in trucks that can still take a beating.
| Model | Typical Applications |
|---|---|
| Peterbilt 537 | Regional delivery, rollback/tow, dump, utility service, box truck |
| Peterbilt 548 | Heavy dump, vacuum trucks, refuse, crane, plow, municipal fleet use |
With a customizable frame, PTO options, and available all-wheel drive (on the 548), these trucks are purpose-built for vocational upfits.
Cab Type: 2.1-Meter Wide Cab
- Shared with: Peterbilt 535, 536, 567, and Kenworth T280, T380, T480
- Provides greater interior room, improved visibility, and better insulation
- Supports larger seats, premium trim, and digital dash options
Aftermarket Seat Compatibility
Because the 537 and 548 use the 2.1m wide-body cab, the seat bolt pattern is 6" x 12", not the standard vocational 4.68" x 12" - an adaptor plate is most likely needed.
- Seats Inc. Legacy series (High Back or LO) — with 2.1m cab adaptor
- National Admiral CT or Commodore — fits with 2.1m cab adaptor plate
- Knoedler Air Chief or Extreme LowRider — with 2.1m cab adaptor
- Gramag Smart MR or eVolution — adaptor available for 2.1m wide-body cabs
Installation Notes
- Always confirm your cab width (2.1m) using your build sheet or VIN data.
- Some wide-base suspensions may restrict travel due to proximity to door trim.
- Low-profile seats are often a better fit if your 537/548 is spec’d with a raised floor or center console.
- For electric features like heat, cooling, massage, or lumbar, confirm 12V power availability.
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Knoedler Air Chief Puffy Seat (choose your options)
Knoedler Manufacturers
Your Price: 2,322.03CAD - 2,562.92CADThe Knoedler Air Chief line offers a customizable seat to meet the individual needs of drivers rather than a one seat fits all solution. All seats come standard with the following features: Puffy Overstuffed Channeled upholstery construction in...Air Chief with 730252-000Your Price: 2,322.03CAD - 2,562.92CAD -
Knoedler Air Chief Seat (choose your options)
Knoedler Manufacturers
Your Price: 1,763.23CAD - 2,715.57CADThe Knoedler Air Chief line offers a customizable seat to meet the individual needs of drivers rather than a one seat fits all solution. All seats come standard with the following features: Upper and Lower Air Adjustable lumbar Color Definition ...Air ChiefYour Price: 1,763.23CAD - 2,715.57CAD -
Knoedler Harrier (choose your options)
Knoedler Manufacturers
Your Price: 1,520.94CADThe Knoedler Harrier is an x-type air suspension seat with optional isolator lock out. The Harrier has been recently expanded to include a mid back, high back (Standard) and Tall Back Option, with optional arms, bellow cover and wide seat. ...9410Your Price: 1,520.94CAD -
Knoedler NEW REVISION Power Chief (choose your options)
Knoedler Manufacturers
Your Price: 5,144.04CADThe Knoedler POWER Chief is pure handcrafted luxury. The powerchief is an excellent replacement for old Comfort Ride Seat or if you are looking for a move to luxury. Standard Features Power Electric Recline Function Power Electric Fore & Aft...98POYour Price: 5,144.04CAD