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Isuzu F-Series

The medium-duty truck above the N-Series. Same commercial-vehicle caution: the body and its equipment are usually a separate electrical system fitted by somebody other than the manufacturer, and a supply or communication fault is worth ruling out there before the chassis harness.

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Isuzu F-Series
Ypy31 · CC0 (external)

Generations

  • Fifth generation (Forward) 1996–2006

    The cab-over medium-duty truck before the 2007 emissions redesign, and the last F-Series without a diesel particulate filter — which is most of what separates its fault list from the current one.

    Body styles
    Cab-over truck
    Platform
    Isuzu Forward
    Engines
    • 7.1 diesel — 6HE1-TC · diesel
    • 7.8 diesel — 6HK1-TC · diesel
    Transmissions
    6-speed manual · Automatic
    Drivetrain
    Rear-wheel drive
  • Sixth generation 2007–present

    Medium-duty truck; the same commercial-vehicle caution about body equipment applies.

    Body styles
    Chassis cab
    Platform
    Isuzu F
    Engines
    • 5.2 diesel — 4HK1 · diesel
    • 7.8 diesel — 6HK1 · diesel
    Transmissions
    6-speed manual · 9-speed manual · 6-speed automated manual
    Drivetrain
    Rear-wheel drive

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

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What makes one worth reading:

  • The car — make, model, year and engine. The same fault behaves differently on each.
  • What you measured, not only what you replaced.
  • What actually fixed it — or that nothing did, which is worth knowing too.

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