Isuzu H-Series – specifications
Built: 2003-2008 · Series: 6, 7, and 8
Data for the version built 2003-2008 · Data origin: Reference work (Wikipedia/Wikibooks) · sources
More machines from model year 2003
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
The Isuzu H-Series from the series 6, 7, and 8 was built from 2003 to 2008 and belongs to Isuzu's medium to heavy trucks. The series name alludes to the US weight classes 6, 7 and 8 in which the maker offered the chassis. The wheelbase is 3,861 mm, and power runs through a manual gearbox.
As engine the register names the 7.8-litre inline six-cylinder Isuzu 6HK1-TC, a turbocharged and intercooled diesel. Its output is given as 160.3 kW, while the manufacturer's figure lies between 215 and 300 hp depending on tune; the engine was thus offered in several power steps. The variety of steps allows the same chassis to be used for distribution, construction and special bodies.
The 6HK1 is an Isuzu engine family found in the brand's trucks and in construction machinery of other makers. Anyone placing the H-Series sees in it a truck with a mid-range engine that Isuzu also sold beyond its own vehicles and that could take bodies up to the heavy class.
Isuzu H-Series – Class 6, 7 and 8 Trucks from the GM Partnership
Isuzu's H-Series comprises cab-over-engine trucks in the US weight classes 6, 7 and 8, developed as part of the commercial-vehicle partnership between Isuzu and General Motors. In 2003, Isuzu launched the H-Series based on the GMT560 chassis from the 6500/7500 range; the H6500 and H7500 models were powered by the 7.8-litre six-cylinder Duramax diesel engine, also used in their badge-engineered sister models. Those sister models were sold by General Motors as the Chevrolet Kodiak and GMC TopKick and built at the Janesville Assembly plant. Listed in the register: the H-Series in classes 6, 7 and 8.
Sources: Wikipedia – Isuzu H-Series
Technical data
Engine
| Engine | 7.8 litre Isuzu 6HK1-TC Turbocharged and Intercooled inline-6 Dieselcorrect |
|---|---|
| Power | 160.3 kW (215–300 hp depending on engine)correct |
Dimensions and weights
| Wheelbase | 3,861 mmcorrect |
|---|
Drivetrain and chassis
| Gearbox | Allison Automaic : 2200 HS/RDS 6-Speed 2500 HS/RDS 6-Speed 2550 HS/RDS 6-Speed 3000 RDS 6-Speed 3500 RDS 6-Speed Eaton-Fuller manual gearbox : FS-5406A 6-Speed FS-6406A 6-Speed RT-8709B 9-Speed RT-8908LL 10-Scorrect |
|---|
Frequently asked questions
How much power does the Isuzu H-Series have?
The Isuzu H-Series delivers 160 kW.
When was the Isuzu H-Series built?
Production years: 2003-2008.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
We do not sell machines. We ask the dealers who carry this model and come back with price and lead time.
Request a quote →
We ask the suppliers and come back with price and lead time.
Request spare parts →
This page carries 5 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
Are you the manufacturer or a dealer of this machine? Check the data and add missing figures — we mark your correction as manufacturer or dealer information.
Check and complete the data →Missing a figure you were looking for? Report it →
Know this machine better? Have a photo, a manual, or know that a figure is wrong? Add it to the register →
Sources: Autopedia (Fandom) (CC BY-SA 3.0) (retrieved August 2026) · Wikipedia (CC BY-SA 4.0) (retrieved October 2026) · Values adopted and presented in our own form; changes from the source are possible. · Data sources and cross-checks
Truck in 3D section
Turn the model, look inside and click an assembly — each one is explained.
