118 and 124 BBC hoods
Peterbilt’s product reference lists two Metton hood lengths. Do not combine the smaller hood with an engine or sleeper without order evidence.
Peterbilt 579 product reference · reviewed September 2026 ↗
THE TRACTOR REFERENCE DESK
Peterbilt
579 family
Peterbilt's aerodynamic on-highway platform, distinct from the traditional 389/589 line.
01 / FIND YOUR REFERENCE
Choose a reference edition
Start with the model configuration, then choose a publication and explore its documented equipment.
Catalogue reference
Selecting equipment records your research choice. It does not calculate dimensions, establish an available combination or rate a truck.
About this edition & its evidence
Peterbilt 579 product reference · reviewed September 2026. Manufacturer product-page option list, reviewed September 2026. The page lists both BBC hoods; engine and sleeper pairing still requires the order guide.
DIMENSION GUIDE / A–H
Precision visual reference
Select a measurement to highlight its endpoints and see what the chosen publication confirms.
Peterbilt 579 · 579 118 BBC · Peterbilt 579 product reference · reviewed September 2026 · 1 published / 7 to verify
Published value Needs verificationSchematic · not to scale
A / SIDE VIEW
Bumper to back of cab (BBC)
Front bumper to the back of the driving cab. Excludes an additional sleeper; it is not overall tractor length.
118 in2,997 mm
Published for this reference; confirm the individual build.
Original illustrative views; not to scale, a certified drawing or a selected-build rendering. Endpoints explain the measurements. Published values come from the cited reference, never from the image.
Selected reference: Peterbilt 579 product reference · reviewed September 2026. Published values remain tied to this edition.
View the complete dimension table ↓02 / THE MEASUREMENTS
Published dimensions
579 118 BBC · Peterbilt 579 product reference · reviewed September 2026
| Measurement | Reference value | Scope / how to verify |
|---|---|---|
| Bumper to back of cab (BBC) | 118 in2,997 mm | Published in the selected manufacturer reference.Peterbilt 579 product reference · reviewed September 2026 ↗ |
7 dimensions still to verify · build record / measurement
| Measurement | Reference value | Scope / how to verify |
|---|---|---|
| Wheelbase | Not verified | Build record / measurement required. |
| Overall tractor length | Not verified | Build record / measurement required. |
| Overall height | Not verified | Build record / measurement required. |
| Cab / body exterior width | Not verified | Build record / measurement required. |
| Width across mirrors | Not verified | Build record / measurement required. |
| Fifth-wheel height | Not verified | Build record / measurement required. |
| Bumper to front axle (BA) | Not verified | Build record / measurement required. |
Planning to transport the truck?
Measure fixed exterior width and mirror width separately, plus overall length, the highest accessory, fifth-wheel height and actual transport weight. Interior bunk width is not exterior width.
03 / UNDER THE SKIN
Powertrain & chassis
PACCAR MX-11 · PACCAR MX-13 · Cummins X15. Metton hood options · build-specific rear suspension. Read engine, gearbox and axle ratings together.
| Measurement | Reference value | Scope / how to verify |
|---|---|---|
| MX-13 maximum power | Up to 510 hp380 kW | Published in the selected manufacturer reference.Peterbilt 579 product reference · reviewed September 2026 ↗ |
| MX-13 maximum torque | Up to 1,850 lb-ft2,508 N·m | Published in the selected manufacturer reference.Peterbilt 579 product reference · reviewed September 2026 ↗ |
| X15 maximum power | Up to 605 hp451 kW | Published in the selected manufacturer reference.Peterbilt 579 product reference · reviewed September 2026 ↗ |
| X15 maximum torque | Up to 2,050 lb-ft2,779 N·m | Published in the selected manufacturer reference.Peterbilt 579 product reference · reviewed September 2026 ↗ |
| Front axle options | 12,000–14,600 lb5,443–6,622 kg | Published in the selected manufacturer reference.Peterbilt 579 product reference · reviewed September 2026 ↗ |
Documented cab options
- Day cab
- 44 in sleeper
- 58 in sleeper
- 72 in sleeper
- 80 in discrete sleeper
- 80 in UltraLoft
Documented transmissions
- PACCAR TX-12
- PACCAR TX-18
- Endurant HD
- Endurant XD
- Eaton FR/RT manual
- Eaton UltraShift Plus
Manufacturer product-page option list, reviewed September 2026. The page lists both BBC hoods; engine and sleeper pairing still requires the order guide.
BUYER RESEARCH · REVIEWED SEPTEMBER 9, 2026
Read the configuration behind the badge
These selectable sheets use Peterbilt’s retained product page as reviewed September 9, 2026. It is an option catalogue, not a specification for every 579 production year. The separate new-579 brochure illustrates the later cab and aerodynamic package.
| Question | Documented reference | Buyer interpretation |
|---|---|---|
| Hood choices | 118 or 124 in BBC | 2,997 or 3,150 mm. Verify the actual hood and bumper; this is not overall tractor length. |
| Sleeper choices | 44, 58, 72, 80 in discrete and 80 in UltraLoft | Discrete sleepers and the integral UltraLoft have different layouts; match the installed design. |
| Diesel powertrain | MX-11, MX-13 or X15; manual and automated choices | The website also discusses natural-gas engines. The diesel references here do not describe those installations or every possible engine/transmission pairing. |
Evidence to take to the inspection
When comparing two 579s, establish the production date and cab/sleeper design before comparing advertised space. Record the full gearbox model and identify the actual axle and suspension: a front-axle catalogue range is not the truck’s certification rating. During inspection, check the sleeper seals and climate equipment and ask how damaged fairings, sensors or cameras were repaired and calibrated where fitted.
Technical references for this review:
04 / MODELS, YEARS & CHANGES
One badge.
Different reference points.
Publication dates and launch milestones do not establish continuous model-year ranges. Match the VIN, production date and equipment era.
UltraLoft accommodation
The new-model brochure documents the 80 in UltraLoft. Interior headroom and mattress dimensions do not establish exterior transport clearance.
Peterbilt new 579 brochure ↗Inspection and build evidence
Review aftertreatment, fairings, collision repairs, bunk systems, idle history and service support before judging a fleet take-out or owner-operator build.
- VIN-linked build information
- engine and transmission tags
- ECM and safety-system reports
- sleeper/HVAC records
- axle and fifth-wheel specification
05 / PUTTING IT TO WORK
Match the trailer to the whole truck.
Day-cab and sleeper builds serve fleet, regional and long-haul work with different wheelbases, tanks, driver systems and axle ratios.
HIGHWAYTRAILERS.CA
Flatbed
Start with deck length, load placement, axle distribution and cab-to-trailer clearance.
Read the guide HIGHWAYTRAILERS.CAStep deck
Compare deck height, gooseneck geometry and the loaded combination’s height.
Read the guide HIGHWAYTRAILERS.CARGN / equipment hauling
Check neck compatibility, fifth-wheel loading, wet-kit requirements and the complete axle layout.
Read the guide HIGHWAYTRAILERS.CAHow trailer capacity works
Review the tractor, coupling, trailer, tyres and load as one combination.
Read the guidePulling a trailer
Confirm build-specific combination, axle, tyre and coupling ratings, kingpin and service connections, clearance and actual axle weights. GVW is the loaded truck; GCW is the loaded combination. Neither is trailer payload.
Moving the tractor as cargo
Give the carrier measured length, exterior and mirror widths, height, ground clearance and transport weight. Assess deck access, breakover, loaded height and securement together.
Deck height & loaded height ↗There is no single “579 towing capacity”.
The model badge, artwork and catalogue option selectors cannot rate an individual combination. Obtain the actual build limits and scale weights.
06 / FOLLOW THE EVIDENCE
Sources & open questions
Reviewed September 7, 2026. Manufacturer figures remain tied to their stated reference; converted equivalents are rounded; original source units are retained. Application and inspection notes are editorial guidance.
Reference-specific evidence needed
- Earlier 579 editions need their own configuration and production-date evidence.
- Obtain build-specific overall length, exterior and mirror widths, overall height, fifth-wheel height and actual weights.